Володя

$lang = $context->getOption('cultureKey');
$modx->lexicon->load($lang.':darvo:front');

print_r($_SESSION['minishop2']['cart']);

[74ecad01c2169c93e9e7b09207bda48e] => Array
        (
            [id] => 209
            [price] => 6590
            [weight] => 0
            [count] => 36
            [options] => Array
                (
                    [size] => XL
                )

            [ctx] => web
            [currency] => RUB
        )

    [0651635c5f0cdcf4adfddd915b198aa7] => Array
        (
            [id] => 209
            [price] => 6590
            [weight] => 0
            [count] => 15
            [options] => Array
                (
                    [size] => L
                )

            [ctx] => web
            [currency] => RUB
        )

&queryVar	query	Имя переменной для получения поискового запроса из $_REQUEST.

$modx->exec("DELETE FROM {$this->modx->getTableName('msCategoryMember')} WHERE `product_id` = {$pid} AND `category_id` = {$cid};");

[size] => array(
	0 => 'двухспальный',
	1 => 'трехспальный',
)

$pid = $resourse->get('id'); // id товара
$cid = 55; // id категории
$res = $modx->getObject('msCategoryMember', array('category_id' => $cid, 'product_id' => $pid));
if (!$res) {
	$res = $modx->newObject('msCategoryMember');
	$res->set('product_id', $pid);
	$res->set('category_id', $cid);
	$res->save();
}

$key = $_REQUEST['fastrouter']['key'];
if ($modx->getCount('modContext', $key)) {
    $modx->switchContext($key);  
}