lolalol

Подскажите ,что за ошибки могут быть PHP Notice: Undefined index:.......system/storage/modification/catalog/view/theme/newstore/template/common/header.tpl on line 753 <li class="nsmenu-parent-block <?php if(count($child['children'])){?> nsmenu-issubchild<?php } ?>"> PHP Notice: Undefined index:........catalog/model/module/nsmenu.php on line 272 $sort_menu[$key] = $item['sort_category'][$value];