What is a cat safe spider repellent?

I have found about 5 brown recluse spiders in the last two weeks 4 of which were in the bedroom. Most of them I have found after one of my two cats have either killed or started chasing them. I'm not too worried about them biting the cats. Their thick paws and hair will protect them. I am worried that eventually my cats will eat one or my wife and I will eventually be bitten (I found one yesterday about two inches from a cat toy I was reaching for). What is a cat safe, brand name repellent or home remedy, to minimize their presence?