سلام خدمت اساتید
من با قطعه کد زیر فیلد های ووکامرس رو اصلاح کردم ؛
/*
* Customize Checkout Field Order
*/
add_filter( 'woocommerce_checkout_fields', 'reorder_woo_fields' );
function reorder_woo_fields( $fields ) {
//move these around in the order you'd like
$fields2['billing']['billing_first_name'] = $fields['billing']['billing_first_name'];
$fields2['billing']['billing_last_name'] = $fields['billing']['billing_last_name'];
$fields2['billing']['billing_email'] = $fields['billing']['billing_email'];
$fields2['billing']['billing_phone'] = $fields['billing']['billing_phone']