classes/Meerkat/Ajax/Ajax.php
public static function response_text($value) {
        $response = Response::factory()
                ->headers('Content-Type', 'text/plain; charset=UTF-8')
                ->body($value);
        self::ajax_response($response);
    }
public static function response_text($value) {
        $response = Response::factory()
                ->headers('Content-Type', 'text/plain; charset=UTF-8')
                ->body($value);
        self::ajax_response($response);
    }
В ответ возвращается HTML