要实现下拉样式，我们必须使用过滤器挂钩tiny_mce_before_init. 此过滤器允许开发人员访问TinyMCE设置数组。

以下示例将自定义样式选项添加到现有样式下拉列表中。

add_filter( \'tiny_mce_before_init\', \'my_mce_before_init\' );

function my_mce_before_init( $settings ) {

    $style_formats = array(                     
            array(
                    \'title\' => \'1/5 Block\',
                    \'block\' => \'div\',
                    \'classes\' => \'col-md-5\',
                    \'wrapper\' => true
            ),
            array(
                    \'title\' => \'Pull Left\',
                    \'block\' => \'div\',
                    \'classes\' => \'pull-left\',
                    \'wrapper\' => true
            ),
            array(
                    \'title\' => \'Button R\',
                    \'selector\' => \'a\',
                    \'classes\' => \'btn btn-default pull-right\'
            ),  
            array(
                    \'title\' => \'Text Center Green Button\',
                    \'selector\' => \'a\',
                    \'classes\' => \'btn btn-green center\'
            ),              
            array(
                    \'title\' => \'Clearfix\',
                    \'block\' => \'div\',
                    \'classes\' => \'clearfix\'
            ),
    );

    $settings[\'style_formats\'] = json_encode( $style_formats );

    return $settings;

}