If there are cats around a person's home or place of business, the best way to get rid of them is to ignore them and to be sure not to feed them. It is also possible to buy a live trap and to take the cat to an animal shelter.
Yet another option for getting rid of unwanted cats is to call in animal control so they can safely and humanely remove the cats from the area. Most cats want to stay in places where they are able to find food, so simply ensuring that no one is feeding the cats will usually work. Keep areas clean of debris to ensure that the cats cannot find shelter, and they will move on to another area.