By DAVE MCNARY CBS Films is in negotiations with the scripting team of Matt Allen and Caleb Wilson ("Four Christmases") to rewrite romantic comedy "Who Gets Bob?" Project's set up with producer Walt Becker and exec producer Jennifer Eatz. Maria Faillace is overseeing the project for CBS. Story, originally penned by Rob Ritger, concerns a divorced couple battling over who gets their best friend Bob. CBS Films president Amy Baer oversaw "Four Christmases" when the project was originally at Sony. Becker's a producer on the MGM-Sony comedy "The Zookeeper." Allen and Wilson sold their pitch for "Eat, Sleep, Poop" earlier this year in a pre-emptive bid by DreamWorks.