Keep certain pages out of sidebar list, put them in footer

I don’t use blogging at all, just pages. Most of my pages I want linked in the normal sidebar. But there are a few that I don’t want to show up with the rest in the sidebar, I want them to show up in the bottom.

Now, here is the thing: I want to be able to do this automatically by setting something on each page, for example, give it a tag or a category of “footer” that will automatically delete it from the side list and put it down on the bottom instead.

Is there any way to do this?