public function showTree() { $tree = new ilOrgUnitExplorerGUI("orgu_explorer", "ilObjOrgUnitGUI", "showTree", new ilTree(1)); $tree->setTypeWhiteList(array("orgu")); if (!$tree->handleCommand()) { $this->tpl->setLeftNavContent($tree->getHTML()); } $this->ctrl->setParameterByClass("ilObjOrgUnitGUI", "ref_id", $_GET["ref_id"]); }