title: PrestaShop create new AdminTab
body: <p>in my file module</p>
  
  <pre><code>class Mymodule extends Module
  {
     public function install()
     {
        ...
        $this-&gt;installModuleTab('AdminMymodule', array(1=&gt;'My Module Admin Tab'), 13)
     }
  
     private function installModuleTab($tabClass, $tabName, $idTabParent)
     {
        $tab = new Tab();
        $tab-&gt;name = $tabName;
        $tab-&gt;class_name = $tabClass;
        $tab-&gt;module = $this-&gt;name;
        $tab-&gt;id_parent = $idTabParent;
        $tab-&gt;active = 1;
        if(!$tab-&gt;save())
          return false;
        return true;
    }
  }
  </code></pre>
  
  <p>it working, Admin Tab: 'My Module Admin Tab' has been created. Now, in file AdminMymodule:</p>
  
  <pre><code>include_once(PS_ADMIN_DIR.'/../classes/AdminTab.php');
  
  class AdminMymodule extends AdminTab
  {
      public function __construct()
      {
          parent::__construct();
      }
  
      public function display()
      {
          echo $this-&gt;l('This is admin my module tab !');
      }
  }
  </code></pre>
  
  <p>when i click to link 'My Module Admin Tab', it result blank page. somebody can help me?</p>