Селектор из базы данных

ajaxSelector.js

$.fn.ajaxSelector = function(offset, limit, callback) {
	var page_id = this.data('page-id');
	var template = this.data('template');
	var data = this.find(":input[value != '']").serialize();
	var params = $.param({
		id: page_id,
		offset: offset,
		limit: limit,
		template: template
	});
	$.ajax({
		url: '/selector.ajax?' + params,
		type: 'POST',
		async: false,
		data: data,
		success: function(html) {
			callback(html);
		}
	});
};

$('form').ajaxSelector(0, 20, function(html) {
	$('#results').append(html);
});

class.php

<?php

/*----- Получение отфильтрованного списка элементов
----------------------------------------------------
------- $parent_id - id родительского элемента
------- $offset - начальная позиция
------- $limit - кол-во элементов на одной странице
--------------------------------------------------*/
		public function ajaxSelector($parent_id, $offset = 0, $limit = 20) {
			$hierarchy = umiHierarchy::getInstance(); 
			$parent = $hierarchy->getElement($parent_id);
			$total = 0;
			if ($parent instanceof umiHierarchyElement) {
				$typesCollection = umiObjectTypesCollection::getInstance();
				$type_id = $hierarchy->getDominantTypeId($parent_id);
				$type = $typesCollection->getType($type_id);
				if ($type instanceof umiObjectType) {
					$selector = new selector('pages');
					$selector->types('object-type')->id($type_id);
					$selector->where('hierarchy')->page($parent_id)->childs(1);

					if ((isset($_REQUEST['filter'])) and (!empty($_REQUEST['filter']))) {
						foreach ($_REQUEST['filter'] as $field => $value) {
							switch (gettype($value)) {
								case 'array': {
									$selector->option('or-mode')->field($field);
									$selector->where($field)->equals($value);
								} break;

								case 'string': {
									$selector->where($field)->like('%'.$value.'%');
								} break;

								case 'integer': {
									$selector->where($field)->equals($value);
								} break;
							}
						}
					}

					$selector->limit($offset, $limit);

					$items = array();
					foreach ($selector as $item) {
						$items[] = def_module::parseTemplate(null, array(
							'attribute:id' => $item->id,
							'attribute:link' => $item->link,
							'node:value' => $item->name
						));
					}
					return def_module::parseTemplate(null, array(
						'nodes:item' => $items,
						'current_count' => count($selector->result),
						'total' => $selector->length
					));
				}
			}
		}
?>

sitemap.xml

<sitemap> 
	<match pattern="selector.ajax">
		<generate src="udata://content/ajaxSelector/{id}/{offset}/{limit}" />
		<transform src="./templates/<template-name>/xslt/ajax/{template}.xsl" />
		<serialize type="html" />
	</match>
</sitemap>