This was found online and thought we would share: 

Cat Urine!  There is only one way to get urine out permanently without leaving a stain or any odor behind. This can be used on any surface or carpet material: 

It’s simple

• 16 oz Hydrogen peroxide
• 1 teaspoon dishwashing liquid
• 1 tablespoon baking soda 
• Mix together and soak area, leave on until completely dry. A white residue appears, then vacuum or sweep away.