public function get_mail($to, $order_id) {

...

   // шаблоны писем

        $subject = $this->settings['mail_subject_'.$to];

        $body = $this->settings['mail_body_'.$to];

        $ishtml = $this->settings['mail_ishtml_'.$to];

        // замена макропеременных

        foreach ($macro as $k => $v) {

            $subject = str_replace('%'.$k, $v, $subject);

            $body = str_replace('%'.$k, $v, $body);

        }



        return array('subject' => $subject, 'body' => $body, 'html' => $is_hrml);

    }