It wasn't clear initially that you where asking about CSS Menu writer, guess I should have looked the forum Section you where posting to.
Most mobile browsers convert double tap to hover, so you could double tap the menu to trigger the hover event.
In reality, CSS menu writer is not mobile compatible.
See this page for some details about pure CSS menus and mobile compatibility:
http://www.prowebdesign.ro/how-to-deal-with-hover-on-touch-screen-devices/