Answers

Cat smell or cat urine smell? 

If it is the latter, I have had success with Nature's Miracle.  If the smell is just the animal, that will diminsh with time and with changing out blinds, flooring, wall coverings, etc. 

If you use a black light you can target the urine areas soak in white vinegar leave for ten min wet vacuum as much up as you can mix up a cup of water with a quarter size dawn dish detergant put in spray bottle saturate area but don't soak. Sprinkle baking soda around on the wet area spread likghtly. let sit until everything dries hard this could take up to a day. break up the crusted area with finger tips when dry then vacuum up. it is a bit time consuming but it is all natural and it works like  nothing else!