woocommerce catalog orderby (oK)

https://inop.vyanh.net/shop

 add_filter( 'woocommerce_catalog_orderby', 'flipmart_custom_woocommerce_catalog_orderby' );
  function flipmart_custom_woocommerce_catalog_orderby( $sortby ) {
    $sortby['menu_order'] = 'Sắp xếp theo';
    return $sortby;
  }