// hiển thị tên sản phẩm trong trang Order của Woo
// ----- add column to orders that shows which products were ordered -----
function ec_order_items_column($columns) {
    $new_columns = array();
    foreach($columns as $key=>$column){
        $new_columns[$key] = $columns[$key];
        if($key === 'order_date') {
            $new_columns['ordered_products'] = __('Ordered Products','woo-custom-ec');
        }
    }
    return $new_columns;
}
add_filter('manage_edit-shop_order_columns', 'ec_order_items_column', 99 );

// ----- add data to new column that shows which products were ordered -----
function ec_order_items_column_cnt($column) {
    global $the_order; // the global order object
    if($column == 'ordered_products') {
        // get items from the order global object
        $order_items = $the_order->get_items();
        if (!is_wp_error($order_items)) {
            foreach($order_items as $order_item) {
                echo $order_item['quantity'].'&nbsp;&times;&nbsp;<a href="'.admin_url('post.php?post='.$order_item['product_id'].'&action=edit' ).'">'.$order_item['name'].'</a><br />';
            }
        }
    }
}
add_action('manage_shop_order_posts_custom_column', 'ec_order_items_column_cnt', 99);