custom_menu_admin.php

<?php

/**
 * Add menu meta box
 *
 * @param object $object The meta box object
 *
 * @link https://developer.wordpress.org/reference/functions/add_meta_box/
 */
function pe_custom_add_menu_meta_box( object $object ) {
	add_meta_box( 'pe-menu-metabox', __( 'Tags' ), 'pe_custom_menu_meta_box', 'nav-menus', 'side' );
	return $object;
}
add_filter( 'nav_menu_meta_box_object', 'pe_custom_add_menu_meta_box', 10, 1);

/**
 * Displays a metabox for a tag menu item.
 *
 * @global int|string $nav_menu_selected_id (id, name or slug) of the currently-selected menu
 */
function pe_custom_menu_meta_box(){
	global $nav_menu_selected_id;
	$walker = new Walker_Nav_Menu_Checklist();

	$current_tab = 'all';
	if ( isset( $_REQUEST['tags-tab'] ) && 'wordpress' == $_REQUEST['tags-tab'] ) {
		$current_tab = 'wordpress';
	} elseif ( isset( $_REQUEST['tags-tab'] ) && 'custom' == $_REQUEST['tags-tab'] ) {
		$current_tab = 'custom';
	} elseif ( isset( $_REQUEST['tags-tab'] ) && 'all' == $_REQUEST['tags-tab'] ) {
		$current_tab = 'all';
	}

	$tags = get_tags(array(
		'taxonomy' => 'post_tag',
		'orderby' => 'name',
		'hide_empty' => false // for development
	));
    $wordpress = array();
	$custom = array();

    /* set values to required item properties */
    foreach ( $tags as &$tag ) {
	    $tag->classes = array();
	    $tag->type = 'tag-custom';
	    $tag->object_id = $tag->term_id;
	    $tag->title = $tag->name;
	    $tag->object = 'tag-custom';
	    $tag->url = '';
	    $tag->attr_title = $tag->name;

        if( false !== strpos( $tag->name , 'wordpress' ) ) {
            $wordpress[] = $tag;
        }

	    if( false !== strpos( $tag->name, 'custom' ) ) {
		    $custom[] = $tag;
	    }
    }

	$removed_args = array( 'action', 'customlink-tab', 'edit-menu-item', 'menu-item', 'page-tab', '_wpnonce' );

	?>

    <div id="tagsarchive" class="categorydiv">
        <ul id="tags-tabs" class="tags-tabs add-menu-item-tabs">
            <li <?php echo ( 'all' == $current_tab ? ' class="tabs"' : '' ); ?>>
                <a class="nav-tab-link" data-type="tabs-panel-tags-all" href="<?php if ( $nav_menu_selected_id ) echo esc_url( add_query_arg( 'tags-tab', 'all', remove_query_arg( $removed_args ) ) ); ?>#tabs-panel-tags-all">
                    <?php _e( 'View All' ); ?>
                </a>
            </li>

            <li <?php echo ( 'wordpress' == $current_tab ? ' class="tabs"' : '' ); ?>>
                <a class="nav-tab-link" data-type="tabs-panel-tags-wordpress" href="<?php if ( $nav_menu_selected_id ) echo esc_url( add_query_arg( 'tags-tab', 'wordpress', remove_query_arg( $removed_args ) ) ); ?>#tabs-panel-tags-wordpress">
                    <?php _e( 'Wordpress' ); ?>
                </a>
            </li>

            <li <?php echo ( 'custom' == $current_tab ? ' class="tabs"' : '' ); ?>>
                <a class="nav-tab-link" data-type="tabs-panel-tags-custom" href="<?php if ( $nav_menu_selected_id ) echo esc_url( add_query_arg( 'tags-tab', 'custom', remove_query_arg( $removed_args ) ) ); ?>#tabs-panel-tags-custom">
			        <?php _e( 'Custom' ); ?>
                </a>
            </li>
        </ul>

        <div id="tabs-panel-tags-all" class="tabs-panel tabs-panel-view-all <?php echo ( 'all' == $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>">
            <ul id="authorarchive-checklist-all" class="categorychecklist form-no-clear">
                <?php
                echo walk_nav_menu_tree( array_map('wp_setup_nav_menu_item', $tags), 0, (object) array( 'walker' => $walker) );
                ?>
            </ul>
        </div>

        <div id="tabs-panel-tags-wordpress" class="tabs-panel tabs-panel-view-wordpress <?php echo ( 'wordpress' == $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>">
            <ul id="tags-checklist-wordpress" class="categorychecklist form-no-clear">
                <?php
                echo walk_nav_menu_tree( array_map('wp_setup_nav_menu_item', $wordpress), 0, (object) array( 'walker' => $walker) );
                ?>
            </ul>
        </div>

        <div id="tabs-panel-tags-custom" class="tabs-panel tabs-panel-view-custom <?php echo ( 'custom' == $current_tab ? 'tabs-panel-active' : 'tabs-panel-inactive' ); ?>">
            <ul id="tags-checklist-custom" class="categorychecklist form-no-clear">
			    <?php
			    echo walk_nav_menu_tree( array_map('wp_setup_nav_menu_item', $custom), 0, (object) array( 'walker' => $walker) );
			    ?>
            </ul>
        </div>

        <p class="button-controls wp-clearfix">
            <span class="list-controls">
                <a href="<?php echo esc_url( add_query_arg( array( 'tags-tab' => 'all', 'selectall' => 1, ) )); ?>#tagsarchive" class="select-all"><?php _e('Select All'); ?></a>
            </span>
            <span class="add-to-menu">
                <input type="submit"<?php wp_nav_menu_disabled_check( $nav_menu_selected_id ); ?> class="button-secondary submit-add-to-menu right" value="<?php esc_attr_e('Add to Menu'); ?>" name="add-tags-menu-item" id="submit-tagsarchive" />
                <span class="spinner"></span>
            </span>
        </p>

    </div>
	<?php
}