我下定决心了，

vc_map( array(
        "name" => __( "xxxxxx" ),
        "base" => "xxxxx",
        "icon" => plugins_url(\'img/vc-icon.png\', __FILE__),
        \'description\' => __( \'xxxxxxxx\', \'xxxxxxxxxx\' ),
        "params" => array(
            array(
                \'type\' => \'dropdown\',
                \'heading\' => __( \'Select xxxxxx\', \'xxxxxxxxxx\' ),
                \'param_name\' => \'id\',
                \'admin_label\' => true,
                \'value\' => $xxxxcvx
            ),
        ),
    ) );