I know your pain....they are an extreme nuisance, as Dreamweaver puts them everywhere.
You can use the "clean HTML code" command in Dreamweaver, or you can do it manually. You can also have all of the DIV tags stripped from the code. Aside from these options, I am not sure of an easier way.
Great! Grand. Fabulous suggestions. Since DIV tags look wonky with some browsers I don't use them at all ... if it can't be designed without a DIV tag, for our purposes it shouldn't be designed at all.