// paste everything below this line in your WP functions.php file below everything else. // always backup your data function allow_all_tinymce_elements_attributes( $init ) { // Allow all elements and all attributes $ext = '*[*]'; // Add to extended_valid_elements if it already exists if ( isset( $init['extended_valid_elements'] ) ) { $init['extended_valid_elements'] .= ',' . $ext; } else { $init['extended_valid_elements'] = $ext; } // return value return $init; } add_filter('tiny_mce_before_init', 'allow_all_tinymce_elements_attributes');