<?php

$catalog_items = new Multifield(array("fields" => array("item_id" => array("plain_text", "ID Товара"))));
$b->field_register("catalog_items", $catalog_items);

$setting_page = new SettingPage("settings", "settings_catalog","Каталог", array());
$setting_page->add($b->setting_register("catalog_items", "Каталог", "catalog_items"));
$setting_page->create();