|I have no idea about HDMI cables, but for RCA and component cables, you should just be able to buy a Y-splitter for each cable. You can get them at electronic stores. And you will need a cable to run from the splitter to your other TV. You will also need a male-to-female converter for each splitter.|
Just plug the PS3 cables in to the splitters, plug the splitters into your TV, then plug a male-to-female converter into the free splitter cable, then run a cable to the other TV.
Or, if your TV has line out jacks, just run an RCA cable between the TVs.