Why come to Israel to go to a mall? Toys "R" Us doesn't look any different here!
But, since you asked, in Haifa, there is the Grand Canyon (supposedly the biggest mall in Israel, but that doesn't mean much), Cinemall and Haifa Mall which are all large malls. Castra is the only one worth going to, in my opinion, because it is unique. There are also smaller malls: Horev Center, City Center, and several others that I can't think of at the moment.
Kiryon, in Kiryat Bialik, is also a large mall, and then there's Hutzot HaMifratz which is on the way to Kiryat Bialik, but I don't remember exactly what that area is called.
If you really want to go shopping (and there's nothing wrong with that), try going to the smaller stores. They're much more interesting than the malls, which, other than Castra, look like all the malls in the U.S.