OK, as I mentioned in the edit above, I'm sorry I didn't understand this sooner. I think we all misunderstood what you were asking. But I think there is a way to do it (obviously the 'color:blue' is just a test):
Code:
div[id^="blogtagmenu_"] {
color:blue !important;
}
But apparently this is CSS 3, so I don't know what that means as far as browsers that support it.