Get tinymce to behave with custom styles, blockformats and editor buttons in Wordpress.

wordpress-tinymce-functions.php

<?php
// Wysiwyg editor configuration (Tiny MCE)

function my_format_TinyMCE( $in ) {
  $in['remove_linebreaks'] = false;
  $in['gecko_spellcheck'] = false;
  $in['keep_styles'] = true;
  $in['accessibility_focus'] = true;
  $in['tabfocus_elements'] = 'major-publishing-actions';
  $in['media_strict'] = false;
  $in['paste_remove_styles'] = false;
  $in['paste_remove_spans'] = false;
  $in['paste_strip_class_attributes'] = 'none';
  $in['paste_text_use_dialog'] = true;
  $in['wpeditimage_disable_captions'] = true;
  $in['plugins'] = 'tabfocus,paste,media,fullscreen,wordpress,wpeditimage,wpgallery,wplink,wpdialogs,wpfullscreen';
  $in['content_css'] = get_template_directory_uri() . "/editor-style.css";
  $in['wpautop'] = true;
  $in['apply_source_formatting'] = false;
  $in['block_formats'] = "Paragraph=p; Heading 3=h3; Heading 4=h4";
  $in['toolbar1'] = 'bold,italic,strikethrough,bullist,numlist,blockquote,hr,link,unlink,wp_more,spellchecker,wp_fullscreen,wp_adv ';
  $in['toolbar2'] = 'formatselect,styleselect,underline,pastetext,removeformat,charmap,undo,redo,wp_help ';
  $in['toolbar3'] = '';
  $in['toolbar4'] = '';
  return $in;
}

// Callback function to filter the MCE settings
function my_mce_before_init_insert_formats( $init_array ) {  
  // Define the style_formats array
  $style_formats = array(  
    // Each array child is a format with it's own settings
    array(  
      'title' => 'intro copy',  
      'block' => 'p',  
      'classes' => 'intro',
      
    ),  
    array(  
      'title' => 'lead copy',  
      'block' => 'p',  
      'classes' => 'lead',
    ),
  );  
  // Insert the array, JSON ENCODED, into 'style_formats'
  $init_array['style_formats'] = json_encode( $style_formats );  
  return $init_array;  
}

// Add our filters
add_filter('tiny_mce_before_init', 'my_mce_before_init_insert_formats' );
add_filter('tiny_mce_before_init', 'my_format_TinyMCE' );
?>