public function index() {
    $this->load->language('catalog/product');
    $this->document->setTitle($this->language->get('heading_title'));
    $this->load->model('catalog/product');
    $this->getList();
}

// Trigger the pre events
$result = $this->event->trigger('controller/' . $route . '/before', array(&$route, &$data));
if (!is_null($result)) {
    return $result;
}
// We dont want to use the loader class as it would make an controller callable.
$action = new Action($route);
// Any output needs to be another Action object.
$output = $action->execute($this->registry);
// Trigger the post events
$result = $this->event->trigger('controller/' . $route . '/after', array(&$route, &$data, &$output));
if (!is_null($result)) {
    return $result;
}
return $output;

public function controller($route, $data = array()) {
  // Sanitize the call
  $route = preg_replace('/[^a-zA-Z0-9_\/]/', '', (string)$route);
  // Keep the original trigger
  $trigger = $route;
  file_put_contents($_SERVER['DOCUMENT_ROOT']."/loader-controller.txt", $trigger."\n", FILE_APPEND);
  // Trigger the pre events
  $result = $this->registry->get('event')->trigger('controller/' . $trigger . '/before', array(&$route, &$data));
  // Make sure its only the last event that returns an output if required.
  if ($result != null && !$result instanceof Exception) {
    $output = $result;
  } else {
    $action = new Action($route);
    $output = $action->execute($this->registry, array(&$data));
  }
  // Trigger the post events
  $result = $this->registry->get('event')->trigger('controller/' . $trigger . '/after', array(&$route, &$data, &$output));
  if ($result && !$result instanceof Exception) {
    $output = $result;
  }
  if (!$output instanceof Exception) {
    return $output;
  }
  }

public function addEvent($code, $trigger, $action, $status = 1, $sort_order = 0) {
    $this->db->query("INSERT INTO `" . DB_PREFIX . "event` SET `code` = '" . $this->db->escape($code) . "', `trigger` = '" . $this->db->escape($trigger) . "', `action` = '" . $this->db->escape($action) . "', `sort_order` = '" . (int)$sort_order . "', `status` = '" . (int)$status . "'");
    return $this->db->getLastId();
}

"Controller" . $sRelPath . $sFileName

$this->load->model('extension/event');
//событие "после загрузки формы товара" - для показа дополнительного поля товара (обязательна маркировка или нет)
$this->model_extension_event->addEvent(
  'productmarkedfield', //название модуля
  'admin/view/catalog/product_form/after', //событие
  'extension/module/productmarkedfield/eventProductFormAfter' //обработчик

$this->load->model('setting/event');
//событие "после загрузки формы товара" - для показа дополнительного поля товара (обязательна маркировка или нет)
$this->model_setting_event->addEvent(
  'productmarkedfield',
  'admin/view/catalog/product_form/after',
  'extension/module/productmarkedfield/eventProductFormAfter'

$reflection = new ReflectionClass($class);
if ($reflection->hasMethod($this->method) && $reflection->getMethod($this->method)->getNumberOfRequiredParameters() <= count($args)) {
    return call_user_func_array(array($controller, $this->method), $args);
} else {
    return new \Exception('Error: Could not call ' . $this->route . '/' . $this->method . '!');
}

public function deleteEvent($code) {
    $this->db->query("DELETE FROM `" . DB_PREFIX . "event` WHERE `code` = '" . $this->db->escape($code) . "'");
}

public function deleteEvent($event_id) {
    $this->db->query("DELETE FROM `" . DB_PREFIX . "event` WHERE `event_id` = '" . (int)$event_id . "'");
}
public function deleteEventByCode($code) {
    $this->db->query("DELETE FROM `" . DB_PREFIX . "event` WHERE `code` = '" . $this->db->escape($code) . "'");
}

$this->load->model('extension/event');
$this->model_extension_event->deleteEvent('productmarkedfield');

$this->load->model('setting/event');
$this->model_setting_event->deleteEvent('productmarkedfield');