Background images can be set through Joomla!
Using the YOOmenu system background images can be set through Joomla! with the built in Joomla! menu image parameter. Now you can set an image to each menu item in the Joomla! menu administration and it will appear as the items background image.
After creating a new menu item open it again for editing. Now you can set an image to the menu item parameter in the parameters section. After saving the image will appear as background image behind the menu item.
