Change TinyMCE Block Format Labels
I would use the hook tiny_mce_before_init : function wpse_106063_tinymce($arr){ $arr[‘theme_advanced_blockformats’] = ‘h1,h2,h3,h4’; $style_formats = array( array(‘title’ => ‘title’, ‘block’ => ‘h1’)), // etc ); $arr[‘style_formats’] = json_encode( $style_formats ); return $arr; } add_filter(‘tiny_mce_before_init’, ‘wpse_106063_tinymce’); Hope it helps. EDIT: add something that should work, not tested. source