You don't HAVE to use hops. I suppose it would depend on how much to the beer side you want your "cider". I you are going the route of 5 gallons cider, 2 lbs DME, and ale yeast... I would hold off on the hops. On the other hand, you could make a wort from some mild hops, 5-6 lbs of DME, 1-2...