Михаил

'processors_path' => MODX_CORE_PATH . '/images/',

<?php
$query = $modx->query("SELECT * FROM modx_ms2_options WHERE `key`= '".$filter."'");
$item = $query->fetch(PDO::FETCH_ASSOC);

if($item['caption']) {
    if($item['measure_unit']){
        $output = $item['caption'] . ', '.$item['measure_unit'];
    }else{
        $output = $item['caption'];
    }
    return $output;
}

$(document).on('mse2_load', function(e, data) {
    console.log(e, data);
});