Prestashop modul - vlastní tab v backoffice

/modules/crawler/crawler.php
<?php   
if (!defined('_PS_VERSION_'))
  exit;

class crawler extends Module
{
    public function __construct()
    {
        $this->name = 'crawler';
        $this->tab = 'administration';
        $this->version = '1.0.0';
        $this->author = '';
        $this->need_instance = 1;
        $this->ps_versions_compliancy = array('min' => '1.6', 'max' => _PS_VERSION_); 
        $this->bootstrap = true;
     
        parent::__construct();
     
        $this->displayName = $this->l('Crawler');
        $this->description = $this->l('Crawler');
     
        $this->confirmUninstall = $this->l('Určitě chcete tento modul odinstalovat?');
     }


      public function install()
    {
        if (!parent::install())
            return false;
        $this->installModuleTab('AdminCrawlerTab', array(1=>'Crawler'), 0);
          return true;
    }

    private function installModuleTab($tabClass, $tabName, $idTabParent)
       {
           if (!$tabid = Tab::getIdFromClassName($tabClass))
           {
          $tab = new Tab();
          $tab->name = $tabName;
          $tab->class_name = $tabClass;
          $tab->module = $this->name;
          $tab->id_parent = $idTabParent;
          $tab->active = 1;
          $tab->save();
          }
          else $tab = new Tab((int)$tabid);
          return $tabid;
      }

    public function uninstall()
    {
        if (!parent::uninstall())
            return false;
        $this->uninstallModuleTab('AdminCrawlerTab');
          return true;
    }

    private function uninstallModuleTab($tabClass)
    {
        if ($id_tab = Tab::getIdFromClassName($tabClass))
        {
            $tab = new Tab((int) $id_tab);
            $tab->delete();
        }
        return true;
    }
}

/modules/crawler/controllers/admin/AdminCrawlerTabController.php
<?php
include_once(dirname(__FILE__).'/../../crawler.php');

class AdminCrawlerTabController extends AdminController
{
    public function __construct()
    {
        parent::__construct();
    }

    public function display()
    {
        parent::display();
    }

    public function renderList()
    {
        return $this->context->smarty->fetch(dirname(__FILE__).'/../../views/templates/admin/template.tpl');
    }  
}
?>