Joomla: get custom fields in a articles module

article_fields.php

<?php

JLoader::register('FieldsHelper', JPATH_ADMINISTRATOR . '/components/com_fields/helpers/fields.php');

foreach ($list as $item) {
    $item->jcfields = FieldsHelper::getFields('com_content.article', $item, true);
    $fields = [];
    foreach($item->jcfields as $jcfield)
    {
        $fields[$jcfield->name] = $jcfield;
    }
    // в массиве $fields все поля материала
}