Try and soak it all up first, but the dollar store carries this cleaner called awesome! It works wonders!! I'd do a little dish soap then try that to make it smell good,, it's one heck of a cleaner and it's only 1$!!! (:
Try to soak up all the pee, then dab with Cleaning vinager, and ammonia to take the smell out off the couch (as weird as that sounds it works wonders) once the spots pretty covered in the cleaner, put a layer of baking soda on the spot to soak up all the cleaner, after 12-24 hours vaccum the baking soda up. you can also put a couple drops of eucalyptus essential oils in the baking soda before applying it to the couch to make it smell good!