I managed to reproduce your issue.
First reinstall the mod_Ariextmenu to revert it back to its default settings. You will keep your menu items as they are part of joomla.
Then add the following css code to your own custom css document. You should always add custom code to your own documents because if you ever decide to update the module it will wipe your code and replace it with the default codes.
Code: |
.ux-menu li .ux-menu-sub li {
z-index: 10000 !important;
top: -1px;
}
|
!important will override the pre-written z-index css rule for the li items in the sub menu. The default z-index value for the ul item is 9999 (or actually the div element containing the ari ext menu), so it needs to be higher.
I also added top: -1px; to prevent it from disappearing when trying to select the sub items.
If you aren't already familiar with tracing code, it is definitely worth learning it. You can right-click any element on a website and select "inspect element". You can then change / add / deactivate code in the browser to preview how it will affect your site before adding it to your css document.
Hope that helps to solve your issue, if not please continue asking