Getting Dogs to Not Chase Cats?

I have 2 small dogs that get along with my friend's cats, until one of cats starts to move! The dogs will sit next to the cats, be nose-to-nose with them and will even try to play with them. But when the dog is is another room and one of the cats walks by, the dogs chase them and become aggressive. Any suggestions on how to get them stop the chase?

By Andrea from Bristol, PA