Joomla, T3, Purity II Tips T3 issue with megamenu, the menus/toolbox never show up. There was an old bug where this change was needed: T3AdminMegamenu.site = '<?php echo JUri::root(true); ?>'; to T3AdminMegamenu.site = '<?php echo JUri::root(); ?>'; in /plugins/system/t3/admin/megamenu/megamenu.tpl.php