I have plenty of pots, but what I need are hanging pots. Why? Because cats love to munch on some houseplants. In fact, that's what did in my last house plant. Furball chomped it down to stems. Bad kitty!
The key to having both pets and plants is first to find plants that your cats won't die from eating. Common spider plants are an easy place to start. Second, you must find a spot to put your plants where your cats can't get to them. Because spider plants are tasty. Very, very tasty. Ask Furball.
Plastic hanging planters are tacky. Metal ones and nice ones are too expensive. In fact, the plastic ones are too expensive, too, while still being tacky. What to do? Make your own, dummy. There are a bunch of tutorials online. Here and here. I'm fairly excited about that "double" hanging planter, but I haven't gotten around to it yet.
All are fairly easy, and don't limit yourself to a particular kind of string(for indoor planters, anyway). Anything strong enough to hold your plants which can also hold a knot is going to work. These can also be customized for any size pot or basket. I prefer not to make my look all funky with lots of knots, but that is a fairly easy option to add if you've ever made jewelry with hemp or leather cord.
I bought some colorful plastic pots from the store and used ordinary twine for mine. These are going up into the attic room with all the nice skylights when they have rooted. Thanks to Sue at work for the spider plant babies!
ASPCA list of plants that are Toxic and Non-toxic to pets. It's not comprehensive, but it should give you a good idea.