Most cats don't like the feel of aluminum foil on their paw pads, and will avoid areas covered in it. Some cats will stay away if a garden is not scented in a manner pleasing to them. If the cat finds these plants offensive, it may move on. I have heard that cats don't like the scent of citrus sprays or peel, but my own experience says that's not true. Both of my cats seem to enjoy smelling citrus, and would never be deterred by a peel or extract.
Some people say that spraying their gardens with a garlic extract keeps cats at bay.
Well, it may just do that, but personally I wouldn't want to spend much time in a garden that smelled like garlic. On the other hand, you may want to deliberately lure cats to one area of your garden in the hopes that they'll leave the rest of your property alone. Moth balls or crystals are another often-recommended scent deterrent. I must say they do seem to work at repelling cats. Any animal or human who injests them or breathes the fumes for too long can be seriously poisoned, or possibly killed.