Changing Category Names without breaking links?

Hey all, thought I’d toss this out there to see if anyone has an easy solution. I’m in the process of restructuring a blog which will entail renaming categories, and moving some posts from under one category to another. Is there a plugin or easy to way to make sure none of the previous links will break?

I’ve done some googling and all I can seem to find are plugins for updating if you change the permalink structure. Unfortunately I’m keeping the same structure, just renaming/moving things.

Suggestions?