Phalaenopsis orchid; I have 2 cats and they have never touched my phals. I think the ultimate reason is they just can’t, if you watch a cat eat grass you will notice how they turn their heads to cut the blades with their carnasials. A phalaenopsis’ leave are fleshy and rounded, a cat cannot get the leaf into the side of its mouth. Other plants I know they don’t like are: Sambac Jasmine, Goldfish Plant, Panda Plant(toxic but really fuzzy and unappetizing), African Violets (also good for low light), pelargoniums, rosemary, basil, stiff or fleshy leaved orchids, lithops, gardenia.
When we got our cats they had never seen a plant up close before, they were fascinated, always looking at them intently and sniffing. Plants that they chewed on got put together in a convenient spot to squirt with a spray bottle(oncidium twinkle buds were their favorite, followed closely by oxalis, which I got rid of due to uncertain toxcicity). I also started growing oats for them to eat instead, and they got tired of getting sprayed pretty quick(adding a Cesar Milan tssst just before the squirt is a good idea cause eventually they will respond to the sound alone). A favorite game for one of them is to pick leaves off my Fukien Tea tree and watch them fall to the ground, I think it’s cute, she doesn’t do much damage.
I noticed them rubbing on a ficus benjamina alot and their eyes started getting watery, I got rid of the fig, and they got better. Sadly lots of pretty plants are toxic, they are popular because they are usually pest free. look