This has been covered many times here so looking at past treads on the subject will tell you that some people report problems with cats and daylilies, others have had both for years with no problems. I think it is like medications for people, it just has different effects on different people or cats in this case. I don't own a cat, but my neighbor does and he spends about as much time in my yard as hers. So all I can report is that daylilies in no way affect him.
