Nice tutorial by User1044 over on Instructables. If you have a cat or cats you have a litter box or boxes. They sell a hidden litter box furniture and planter but they are sort of expensive.
Totally worth it to hide the nasty box in my humble opinion but still. This tutorial takes you through the steps of turning an old night stand or two into your own hidden litter box furniture. This turned out pretty nice. I saw one for sale on craigslist one time that I think will always be my favorite.
They had taken an old hope chest and made doors in the tow ends like and entry and an exit. It looked beautiful because I love hope chests and it hid the litter box but it also had the space for the bag of litter and scoop and stuff.