/**
  * Définition du contenu de l'onglet
  **/
 static function displayTabContentForItem(CommonGLPI $item, $tabnum = 1, $withtemplate = 0)
 {
     switch ($item->getType()) {
         case __CLASS__:
             switch ($tabnum) {
                 case 1:
                     $item->showForm($item->getID());
                     break;
                 case 2:
                     $tagitem = new PluginTagTagItem();
                     $ID = $item->getField('id');
                     $tagitem->showForTag($item);
                     break;
             }
     }
     return true;
 }