预WP 3.3：http://www.dev4press.com/2010/tutorials/wordpress/tips/add-rich-text-editor-to-your-plugin/

如果您使用的是WP 3.3或更高版本，则可以查找WP\\U编辑器：http://codex.wordpress.org/Function_Reference/wp_editor

$settings = array(
    \'teeny\' => true,
    \'textarea_rows\' => 15,
    \'tabindex\' => 1
);
wp_editor(esc_html( __(get_option(\'whatever_you_need\', \'whatever\'))), \'terms_wp_content\', $settings);

<?php 
  function my_address_function(){

   if(isset($_POST[\'special_content\'])){
     update_option(\'special_content\', $_POST[\'special_content\']);
   }

?>
<div class=\'wrap\'>
  <h2>My Super Admin Page</h2>
    <form method=\'post\'>
      <?php
          $content = get_option(\'special_content\');
          wp_editor( $content, \'special_content\', $settings = array(\'textarea_rows\'=> \'10\') );

          submit_button(\'Save\', \'primary\');
       ?>
   </form>
  </div><!-- .wrap -->
 <?php
}
?>

如果我没有看错你的问题：

wordpress。org/extend/plugins/tinymce高级/

选项中有一个复选框，用于显示主题的自定义样式。