This is the kind of annoying as fuck structured data I have to support for legacy Registration and Pitch configs

KillMe.php

<?php
class LegacyOfferConfig extends eMusicPostTypes implements PostType {
    var $post_type;
    var $boxes;
    var $lists;
    var $qas;
    
    function init() {
        $this->post_type = 'legacy_offer_config';
        
        add_action( 'init',                                 array( $this, 'type' ) );
        add_action( 'save_post',                            array( $this, 'save' ), 10, 2 );
        add_action( 'add_meta_boxes_legacy_offer_config',   array( $this, 'post_type_actions' ) );
        add_action( 'wp_ajax_catalog-list-select',          array( $this, 'catalog_list_select' ) );
        add_action( 'wp_ajax_reg-box-select',               array( $this, 'reg_box_select' ) );
        add_filter( 'image_send_to_editor',                 array( $this, 'send_to_editor' ), 10, 2 );
    }
    
    function post_type_actions() {
        add_action( 'admin_head',           array( $this, 'inline_admin_css_js' ) );
        
        add_filter( 'generic_meta_title',   function ( $default ) {
            return __( 'Configs' );
        } );   
    }
    
    function inline_admin_css_js() {
    ?>
<style type="text/css">
#poststuff .emusic-admin {padding: 0 10px}
#poststuff .emusic-admin .emusic-admin {padding: 0 20px}
#poststuff .emusic-admin h4 {margin-bottom: 5px; text-transform: uppercase; font-size: 13px}    
#poststuff .emusic-admin .emusic-admin h4 {text-transform: none}
#poststuff .emusic-admin p {margin: 5px 0}
#poststuff .emusic-admin input[type="text"] {margin: 5px 0}
#poststuff .emusic-admin p img {margin: 10px 0; display: block}
</style>
<script type="text/javascript">
jQuery(document).ready(function () {
    var $ = jQuery;
    
    $('.add-media-image').click(function () {
        window.send_to_editor = function (html) {
            html = JSON.parse(html);
            
            var item = $('#' + html.send_to);
            item.val(html.image_id);
            item.parent()
                .find('img')
                    .attr({
                        src     : html.url,
                        width   : html.w,
                        height  : html.h
                    });
            tb_remove();
        }; 
    });
    
    $('.add-reg-box').click(function (e) {
        e.preventDefault();
        
        var elem = $(this), selects, boxes;
        
        boxes = elem.parent();
        selects = boxes.find('select');
        
        $.ajax({
            url  : ajaxurl,
            data : {
                action  : 'reg-box-select',
                page    : elem.attr('data-page'),
                index   : selects.length
            },
            success: function (data) {
                boxes.find('p').append($(data));
            }
        });
    });
    
    $('.add-catalog-list').click(function (e) {
        e.preventDefault();
        
        var elem = $(this), selects, lists;
        
        lists = elem.parent();
        selects = lists.find('select');
        
        $.ajax({
            url  : ajaxurl,
            data : {
                action  : 'catalog-list-select',
                page    : elem.attr('data-page'),
                index   : selects.length
            },
            success: function (data) {
                lists.find('p').append($(data));
            }
        });
    });
});    
</script>
<?php
    }
    
    function send_to_editor( $html, $id ) {
        $ref = wp_get_referer();
        $params = parse_url( $ref, PHP_URL_QUERY );
        parse_str( $params, $bits );
        if ( isset( $bits['send_to'] ) ) {
            $atts = wp_get_attachment_image_src( $id, array( 200, 9999 ) );
            $src = 'http://wp-images.emusic.com' . parse_url( $atts[0], PHP_URL_PATH );
            return json_encode( array( 'image_id' => $id, 'url' => $src, 'send_to' => $bits['send_to'], 'w' => $atts[1], 'h' => $atts[2] ) );            
        }
        
        return $html;
    }
    
    function type() {
        $this->type_clean( array( 
            'type'                  => $this->post_type, 
            'publicly_queryable'    => false,
            'exclude_from_search'   => true,
            'show_ui'               => true,
            'show_in_menu'          => 'emusic-legacy',
            'labels'                => $this->inflection( 'Legacy Offer Config' ),  
            'supports'              => array( 'title', 'editor', 'thumbnail' ),
            'taxonomies'            => array( 'region' ),
            'callback'              => array( $this, 'config_ui' )
        ) );
    }
    
    /**
     * AJAX actions
     *  
     */
    function catalog_list_select() {
        extract( $_REQUEST );
    ?>
        <select name="pitch_config[page][<?php echo $page ?>][catalogList][<?php echo $index ?>]">
        <?php $this->_catalog_list_cache() ?>
        </select><br/>
    <?php
        exit();
    }
    
    function reg_box_select() {
        extract( $_REQUEST );
    ?>
        <select name="reg_config[page][<?php echo $page ?>][boxes][<?php echo $index ?>]">
        <?php $this->_box_cache() ?>    
        </select><br/>
    <?php
        exit();
    }
    
    /**
     * Exists, then echo and escape
     */
    function _eee( $data, $prop ) {
        if ( isset( $data[$prop] ) ) {
            echo esc_attr( $data[$prop]  );
        }
    }
    
    function _media_trigger( $params = array() ) {
        $defaults = array(
            'tab'           => 'library',
            'send_to'       => '',
            'post_id'       => isset( $_GET['post'] ) ? $_GET['post'] : '-112376575887',
            'emusic-hijack' => 1,
            'type'          => 'image',
            'TB_iframe'     => 'true'
        );
        
        $params = wp_parse_args( $params, $defaults );
        $params = http_build_query( $params );
    ?>    
        <a class="add-media-image thickbox" href="media-upload.php?<?php echo $params ?>">
            Select Image From Library
        </a><br/>        
    <?php
    }
    
    function _qa_cache( $ids = array() ) {
        if ( !$this->qas ) {
            global $wpdb;
            $this->qas = $wpdb->get_results( "SELECT post_title, ID FROM {$wpdb->posts} WHERE post_type = 'legacy_reg_qa'" );
        }
        
        if ( !empty( $this->qas ) ) {
            printf( '<option value=""> --- SELECT A Q&amp;A --- </option>' );
            foreach ( $this->qas as $qa ) {
                printf( 
                    '<option value="%d" %s>%s</option>', 
                    $qa->ID, 
                    selected( in_array( $qa->ID, $ids ) ), 
                    $qa->post_title 
                );
            }            
        }
    }
    
    function _box_cache( $id = 0 ) {
        if ( !$this->boxes ) {
            global $wpdb;
            $this->boxes = $wpdb->get_results( "SELECT post_title, ID FROM {$wpdb->posts} WHERE post_type = 'legacy_reg_box'" );
        }
        
        if ( !empty( $this->boxes ) ) {
            printf( '<option value=""> --- SELECT A BOX --- </option>' );
            foreach ( $this->boxes as $box ) {
                printf( 
                    '<option value="%d" %s>%s</option>', 
                    $box->ID, 
                    selected( $box->ID == $id ), 
                    $box->post_title 
                );
            }            
        }
    }
    
    function _catalog_list_cache( $id = 0 ) {
        if ( !$this->lists ) {
            global $wpdb;
            $this->lists = $wpdb->get_results( "SELECT post_title, ID FROM {$wpdb->posts} WHERE post_type = 'legacy_catalog_list'" );
        }
        
        if ( !empty( $this->lists ) ) {
            printf( '<option value=""> --- SELECT A CATALOG LIST --- </option>' );
            foreach ( $this->lists as $list ) {
                printf( 
                    '<option value="%d" %s>%s</option>', 
                    $list->ID, 
                    selected( $list->ID == $id ), 
                    $list->post_title 
                );
            }            
        }
    }    
    
    function pitch_page_1_ui( $data ) {
        $prefix = 'pitch_config[page][0]';
    ?>
    <h4>Page 1</h4>
    <div class="emusic-admin">
        <h4>Title</h4>
        <p>
            <input type="text" class="widefat" name="<?php echo $prefix ?>[title]" value="<?php $this->_eee( $data, 'title' ) ?>"/>
        </p>
        <h4>Bullets</h4>
        <div class="emusic-admin">
            <?php if ( !empty( $data['bullet'] ) ) foreach ( $data['bullet'] as $i => $bullet ): ?>
            <h4>Bullet <?php echo $i + 1 ?></h4>
            <p>
                <label>Heading:</label>
                <input type="text" class="widefat" name="<?php echo $prefix ?>[bullet][<?php echo $i ?>][heading]" value="<?php $this->_eee( $bullet, 'heading' ) ?>"/><br/>
                <label>Line 1:</label>
                <input type="text" class="widefat" name="<?php echo $prefix ?>[bullet][<?php echo $i ?>][line1]" value="<?php $this->_eee( $bullet, 'line1' ) ?>"/><br/>
                <label>Line 2:</label>
                <input type="text" class="widefat" name="<?php echo $prefix ?>[bullet][<?php echo $i ?>][line2]" value="<?php $this->_eee( $bullet, 'line2' ) ?>"/>
            </p>
            <?php endforeach ?>
        </div>
        <?php
        
        $this->parse_offer( $data['offer'], 0 );
        $this->parse_signup( $data['signup'], 0 );
        ?>
    </div>
    <?php
    }
    
    function pitch_page_2_ui( $data ) {
    ?>
    <h4>Page 2</h4>
    <div class="emusic-admin">
        <h4>Title</h4>
        <p>
            <input type="text" class="widefat" name="pitch_config[page][1][title]" value="<?php $this->_eee( $data, 'title' ) ?>"/>
        </p>
        <h4>Q and A</h4>
        <select name="pitch_config[page][1][qa]">
            <?php $this->_qa_cache( array( isset( $data['qa'] ) ? $data['qa'] : '' ) ) ?>
        </select><br/>
        <?php 
        $this->parse_offer( $data['offer'], 1 );
        $this->parse_signup( $data['signup'], 1 );
        ?>
    </div>
    <?php
    }
    
    function pitch_page_3_ui( $data ) {
    ?>
    <h4>Page 3</h4>
    <div class="emusic-admin">
        <h4>Title</h4>
        <p>
            <input type="text" class="widefat" name="pitch_config[page][2][title]" value="<?php $this->_eee( $data, 'title' ) ?>"/>
        </p>
        <h4>Text</h4>
        <p>
            <textarea rows="10" class="widefat" name="pitch_config[page][2][text]"><?php 
                if ( isset( $data['text'] ) ) {
                    echo esc_html( $data['text'] );
                }  
            ?></textarea>
        </p> 
        <h4>Heading</h4>
        <p>
            <input type="text" class="widefat" name="pitch_config[page][2][heading]" value="<?php $this->_eee( $data, 'heading' ) ?>"/>
        </p>
        <?php 
        $this->parse_offer( $data['offer'], 2 );
        $this->parse_signup( $data['signup'], 2 );
        ?>
        <h4>Catalog Lists</h4>
        <div class="lists">
            <a class="add-catalog-list" data-page="2">Add a Catalog List</a>
            <p>
                <?php if ( !empty( $data['catalogList'] ) ) foreach ( array_filter( $data['catalogList'] ) as $i => $list ): ?>
                <select name="pitch_config[page][2][catalogList][<?php echo $i ?>]">
                <?php $this->_catalog_list_cache( $list ) ?>
                </select><br/>
                <?php endforeach ?>
            </p>
        </div>    
    </div>
    <?php
    }
    
    function pitch_page_4_ui( $data ) {
    ?>
    <h4>Page 4</h4>
    <div class="emusic-admin">
        <h4>Title</h4>
        <p>
            <input type="text" class="widefat" name="pitch_config[page][3][title]" value="<?php $this->_eee( $data, 'title' ) ?>"/>
        </p>
        <h4>Comparison Image</h4>
        <?php 
        $key = 'pitch-page-4-comparison-image';
        $this->_media_trigger( array( 'send_to' => $key ) );

        if ( isset( $data['comparisonImage'] ) ) {
            $html = $this->_resolve_image_by_id( $data['comparisonImage'] );
            if ( !empty( $html ) )
                echo $html;
        }
        ?>
        <input id="<?php echo $key ?>" type="hidden" name="pitch_config[page][3][comparisonImage]" value="<?php $this->_eee( $data, 'comparisonImage' ) ?>"/><br/>
        <?php 
        $this->parse_offer( $data['offer'], 3 );
        $this->parse_signup( $data['signup'], 3 );
        ?>
    </div>
    <?php
    }    
    
    function reg_page_ui( $data, $i ) {
        $page_number = $i + 1;
    ?>
    <h4>Page <?php echo $page_number ?></h4>
    <div class="emusic-admin">
        <h4>Headline</h4>
        <p>
            <input type="text" class="widefat" name="reg_config[page][<?php echo $i ?>][headline]" value="<?php $this->_eee( $data, 'headline' ) ?>"/>
        </p>
        <h4>Motivation</h4>
        <p>
            <input type="text" class="widefat" name="reg_config[page][<?php echo $i ?>][motivation]" value="<?php $this->_eee( $data, 'motivation' ) ?>"/>
        </p> 
        <h4>Instructions</h4>
        <p>
            <textarea rows="4" class="widefat" name="reg_config[page][<?php echo $i ?>][instructions]"><?php     
                if ( isset( $data['instructions'] ) ) {
                    echo esc_html( $data['instructions'] );
                }        
            ?></textarea>
        </p>   
        <h4>Boxes</h4>
        <div class="boxes">
            <a class="add-reg-box" data-page="<?php echo $i ?>">Add a box</a>
            <p>
            <?php if ( !empty( $data['boxes'] ) ): foreach ( $data['boxes'] as $j => $box ): ?>
                <select name="reg_config[page][<?php echo $i ?>][boxes][<?php echo $j ?>]">
                <?php $this->_box_cache( $box ) ?>    
                </select><br/>
            <?php endforeach; endif ?>    
            </p>
        </div>
        <h4>Continue Button</h4>
        <?php
        if ( isset( $data['button'] ) )
            $data['continueButton'] = $data['button'];
        ?>
        <p>
            <label>Line 1:</label>
            <input type="text" class="widefat" name="reg_config[page][<?php echo $i ?>][continueButton][line1]" value="<?php if ( isset( $data['continueButton'] ) ) $this->_eee( $data['continueButton'], 'line1' ) ?>"/><br/>
            <label>Line 2:</label>
            <input type="text" class="widefat" name="reg_config[page][<?php echo $i ?>][continueButton][line2]" value="<?php if ( isset( $data['continueButton'] ) ) $this->_eee( $data['continueButton'], 'line2' ) ?>"/>
        </p>   
    </div>
    <?php
    }
    
    function _resolve_image_id_by_hash( $hash ) {
        global $wpdb;
        return $wpdb->get_var( "SELECT ID FROM {$wpdb->posts} WHERE post_type = 'attachment' AND post_name = '{$hash}'" );
    }
    
    function _resolve_image_by_hash( $hash, $width = 200 ) {
        $id = $this->_resolve_image_id_by_hash( $hash );
        $atts = wp_get_attachment_image_src( $id, array( $width, 9999 ) );

        if ( !empty( $atts ) )
            return sprintf( '<img src="%s" width="%d" height="%d"/>', $atts[0], $atts[1], $atts[2]  );  
    }    
    
    function _resolve_image_by_id( $id, $width = 200 ) {
        $atts = wp_get_attachment_image_src( $id, array( $width, 9999 ) );

        if ( !empty( $atts ) )
            return sprintf( '<img src="%s" width="%d" height="%d"/>', $atts[0], $atts[1], $atts[2]  );  
    }
    
    function parse_offer( $offer, $page = null ) {
        $prefix = is_null( $page ) ? 'pitch_config[offer]' : sprintf( 'pitch_config[page][%d][offer]', $page );
        $heading = is_null( $page ) ? __( 'Main Offer' ) : __( 'Offer' );        
    ?>
    <h4><?php echo $heading ?></h4>
    <div class="emusic-admin">
        <p>
            <label>Overlay:</label>
            <?php 
            $key = is_null( $page ) ? 'overlay-main-offer' : ( 'overlay-page-offer-' . $page );
            $this->_media_trigger( array( 'send_to' => $key ) );
            
            if ( isset( $offer['overlay'] ) ) {
                $html = $this->_resolve_image_by_id( $offer['overlay'] );
                if ( !empty( $html ) )
                    echo $html;
            }
            ?>
            <input id="<?php echo $key ?>" type="hidden" name="<?php echo $prefix ?>[overlay]" value="<?php $this->_eee( $offer, 'overlay' ) ?>"/><br/>
            <label>Box:</label>
            <select name="<?php echo $prefix ?>[box]">
            <?php $this->_box_cache( isset( $offer['box'] ) ? $offer['box'] : 0 ) ?>    
            </select>
        </p>   
    </div>
    <?php
    }
    
    function parse_signup( $signup, $page = null ) {
        global $post_ID;
        $prefix = is_null( $page ) ? 'pitch_config[signup]' : sprintf( 'pitch_config[page][%d][signup]', $page );
        $heading = is_null( $page ) ? __( 'Main Signup' ) : __( 'Signup' );        
    ?>
    <h4><?php echo $heading ?></h4>
    <div class="emusic-admin">
        <p>
            <label>Headline:</label>
            <input type="text" class="widefat" name="<?php echo $prefix ?>[headline]" value="<?php $this->_eee( $signup, 'headline' ) ?>"/><br/>
        </p>
        <p>
            <label>Optional Image:</label>
            <?php 
            $key = is_null( $page ) ? 'opt-image-main-signup' : ( 'opt-image-page-signup-' . $page );
            $this->_media_trigger( array( 'send_to' => $key ) );
            
            if ( isset( $signup['optionalImage'] ) ) {
                $html = $this->_resolve_image_by_id( $signup['optionalImage'] );
                if ( !empty( $html ) )
                    echo $html;
            }
            ?>
            <input id="<?php echo $key ?>" type="hidden" name="<?php echo $prefix ?>[optionalImage]" value="<?php $this->_eee( $signup, 'optionalImage' ) ?>"/><br/>
        </p>
        <h4>Button</h4>
        <p>
            <label>Line 1:</label>
            <input type="text" class="widefat" name="<?php echo $prefix ?>[button][line1]" value="<?php $this->_eee( $signup['button'], 'line1' ) ?>"/><br/>
            <label>Line 2:</label>
            <input type="text" class="widefat" name="<?php echo $prefix ?>[button][line2]" value="<?php $this->_eee( $signup['button'], 'line2' ) ?>"/>
        </p> 
        
        <?php if ( 3 === $page ): ?>
        <h4>Bullet</h4>
        <div class="emusic-admin">
            <p> 
                <label>Heading:</label>
                <input type="text" class="widefat" name="<?php echo $prefix ?>[bullet][heading]" value="<?php empty( $signup['bullet'] ) ? '' : $this->_eee( $signup['bullet'], 'heading' ) ?>"/><br/>
                <label>Line 1:</label>
                <input type="text" class="widefat" name="<?php echo $prefix ?>[bullet][line1]" value="<?php empty( $signup['bullet'] ) ? '' : $this->_eee( $signup['bullet'], 'line1' ) ?>"/><br/>
                <label>Line 2:</label>
                <input type="text" class="widefat" name="<?php echo $prefix ?>[bullet][line2]" value="<?php empty( $signup['bullet'] ) ? '' : $this->_eee( $signup['bullet'], 'line2' ) ?>"/>
                <label>Image:</label>
                <?php 
                $key = 'pitch-page-3-bullet-image';
                $this->_media_trigger( array( 'send_to' => $key ) );

                $id = '';
                if ( isset( $signup['bullet']['image'] ) ) {
                    if ( strstr( $signup['bullet']['image'], '-' ) ) {
                        $html = $this->_resolve_image_by_hash( $signup['bullet']['image'] ); 
                        $id = $this->_resolve_image_id_by_hash( $signup['bullet']['image'] );
                    } else {
                        $html = $this->_resolve_image_by_id( $signup['bullet']['image'] ); 
                        $id = $signup['bullet']['image'];
                    }
  
                    if ( !empty( $html ) )
                        echo $html;
                }
                ?>
                <input id="<?php echo $key ?>" type="hidden" name="<?php echo $prefix ?>[bullet][image]" value="<?php echo $id ?>"/>
            </p>
        </div>
        <?php endif ?>
    </div>
    <?php
    }
    
    function _raw_meta( $id, $key ) {
        global $wpdb;
        $data = $wpdb->get_var( "SELECT meta_value FROM {$wpdb->postmeta} WHERE meta_key = '{$key}' AND post_id = {$id}" );
        return unserialize( $data );
    }
    
    function config_ui( $post ) {
        $pitch = $this->_raw_meta( $post->ID, 'pitch_config' );
    ?>
    <div class="postbox closed">
        <div class="handlediv"><br/></div>
        <h3>Pitch Config</h3>

        <?php wp_nonce_field( 'legacy-offer-config', 'pitch_config_nonce' ) ?>
        
        <div class="emusic-admin inside">
            <?php 
            $this->parse_offer( $pitch['offer'] );
            $this->parse_signup( $pitch['signup'] );

            /**
            * The JAVA side expects 4 pages, and it's not changing
            * This is all for legacy support
            *  
            */
            for ( $i = 0; $i < 4; $i++ ) 
                call_user_func( array( $this, sprintf( 'pitch_page_%d_ui', $i + 1 ) ), $pitch['page'][$i] );   

            ?>
        </div>
    </div>

    <?php
    /**
     * Registration Config
     * 
     */       

    $reg = $this->_raw_meta( $post->ID, 'reg_config' );
    $acpt = isset( $reg['allowCatalogPassThru'] ) && in_array( $reg['allowCatalogPassThru'], array( '1', 'true', true, 1 ) );
    ?>    
    <div class="postbox closed">
        <div class="handlediv"><br/></div>
        <h3>Registration Config</h3>

        <?php wp_nonce_field( 'legacy-offer-config', 'reg_config_nonce' ) ?>
        
        <div class="emusic-admin inside">
            <p>Allow Catalog Pass-thru: &nbsp; 
                <input type="radio" name="reg_config[allowCatalogPassThru]" value="true" <?php checked( $acpt ) ?> /> Yes&nbsp; 
                <input type="radio" name="reg_config[allowCatalogPassThru]" value="false" <?php checked( empty( $acpt ) ) ?>/> No&nbsp;
            </p>
            <?php 
                /**
                * The JAVA side expects 4 pages, and it's not changing
                * This is all for legacy support
                *  
                */
                for ( $i = 0; $i < 4; $i++ ) 
                    $this->reg_page_ui( $reg['page'][$i], $i );
            ?>
        </div>
    </div>
    <?php
    }
    
    function save( $id, $post ) {
        $this->save_postdata( $id, $post, array( $this, 'callback' ) );
    }
    
    function _fix_and_cast_data( &$arr ) {
        array_walk_recursive( $arr, function ( &$value, $key ) {
            if ( is_numeric( $value ) ) {
                $value = (int) $value;
            } else if ( is_string( $value ) && !seems_utf8( $value ) ) {
                $value = Encoding::fixUTF8( $value );
            }
        } );
    }
    
    function callback( $id, $post ) {
        if ( $this->post_type === $post->post_type ) {
            
            if ( wp_verify_nonce( $_POST['pitch_config_nonce'], 'legacy-offer-config' ) ) {
                $arr = stripslashes_deep( $_POST['pitch_config'] );
                $this->_fix_and_cast_data( $arr );
                
                update_post_meta( $id, 'pitch_config', $arr );
            }
            
            if ( wp_verify_nonce( $_POST['reg_config_nonce'], 'legacy-offer-config' ) ) {
                $arr = stripslashes_deep( $_POST['reg_config'] );
                $this->_fix_and_cast_data( $arr );

                update_post_meta( $id, 'reg_config', $arr );
            }
        }        
    }    
}
$_legacy_offer_config = new LegacyOfferConfig();
$_legacy_offer_config->init();