[WORDPRESS] Snippet para mostrar TinyMCE en el cuadro excerpt

gistfile1.php

	function lb_editor_remove_meta_box() {
	    global $post_type;
		/**
		 *  Check to see if the global $post_type variable exists
		 *  and then check to see if the current post_type supports
		 *  excerpts. If so, remove the default excerpt meta box
		 *  provided by the WordPress core. If you would like to only
		 *  change the excerpt meta box for certain post types replace
		 *  $post_type with the post_type identifier.
		 */
	    if (isset($post_type) && post_type_supports($post_type, 'excerpt')){
	        remove_meta_box('postexcerpt', $post_type, 'normal');
	    } 
	}
	add_action('admin_menu', 'lb_editor_remove_meta_box');
	 
	function lb_editor_add_custom_meta_box() {
	    global $post_type;
	    /**
	     *  Again, check to see if the global $post_type variable
	     *  exists and then if the current post_type supports excerpts.
	     *  If so, add the new custom excerpt meta box. If you would
	     *  like to only change the excerpt meta box for certain post
	     *  types replace $post_type with the post_type identifier.
	     */
	    if (isset($post_type) && post_type_supports($post_type, 'excerpt')){
	        add_meta_box('postexcerpt', __('Excerpt'), 'lb_editor_custom_post_excerpt_meta_box', $post_type, 'normal', 'high');
	    }
	}
	add_action( 'add_meta_boxes', 'lb_editor_add_custom_meta_box' );
	 
	function lb_editor_custom_post_excerpt_meta_box( $post ) {

	    /**
	     *  Adjust the settings for the new wp_editor. For all
	     *  available settings view the wp_editor reference
	     *  http://codex.wordpress.org/Function_Reference/wp_editor
	     */
	    $settings = array( 'textarea_rows' => '12', 'quicktags' => false, 'tinymce' => true);

	    /**
	     *  Create the new meta box editor and decode the current
	     *  post_excerpt value so the TinyMCE editor can display
	     *  the content as it is styled.
	     */
	    wp_editor(html_entity_decode(stripcslashes($post->post_excerpt)), 'excerpt', $settings);
	 
	    // The meta box description - adjust as necessary
	    echo '<p><em>Excerpts are optional, hand-crafted, summaries of your content.</em></p>';
	}