а я понял в модуле категории показывает только на производителях
$category = JTable::getInstance('category', 'jshop');
$category->load($category_id);
$manufacturers = $mainframe->getUserStateFromRequest( $contextfilter.'manufacturers', 'manufacturers', array());
$manufacturers = filterAllowValue($manufacturers, "int+");
$filter_manufactures = $category->getManufacturers();
$manufacturer = JTable::getInstance('manufacturer', 'jshop');
$manufacturer->load($manufacturer_id);
$categorys = $mainframe->getUserStateFromRequest( $contextfilter.'categorys', 'categorys', array());
$categorys = filterAllowValue($categorys, "int+");
$filter_categorys = $manufacturer->getCategorys();
может тут че то можно сделать ? =(