Вывод мультикатегорий в MS2

category.php

$id = $modx->resource->id;
$tpl = '@INLINE <a href="[[~[[+id]]]]">[[+pagetitle]]</a>';
$pdo = $modx->getService('pdoFetch');

$options = array(
	'innerJoin' => array(
		'msCategory' => array('on' => 'msCategoryMember.category_id = msCategory.id')
	),
	'select' => array('msCategory' => 'all'),
	'sortby' => 'msCategory.id'
);
$conditions = array('product_id' => $id);
$rows = $pdo->getCollection('msCategoryMember', $conditions, $options);

$output = '';
foreach ($rows as $row) {
	$output .= $pdo->getChunk($tpl, $row);
}

return $output;