CMS menu broken on the iPhone

[BeHold]

Our site: livingpresence.com
Test platform: iPhone with Chrome
Bug: submenus in top menu are not working, plus menu stops working after one click (or touch)
Source of problem: cssmenu_ulshadow template
Version of CMS (no, we cannot update the whole thing): 1.9.4.2 "Faanui"

Any ideas how to edit this template? I posted its contents here: https://gist.github.com/3818122

[BeHold]

It's actually a bigger issue than it seemed, as the site crashes the whole browser on both iPad and iPhone when using not the latest iOS.
I don't have an easy way to debug that but reported this bug here: http://dev.cmsmadesimple.org/bug/view/8469
I'm thinking to display some warning about this using an UDT like

Code: Select all

$browser = cge_utils::get_browser();
if( $browser->isMobile() )
//...