How to block certain websites on iPhone 4?

I'm on my iPhone rite now and I'm tryna watch dragon ball z (don't laugh I'm still a kid) and this stupid apple rewards website keeps coming up so I can't watch. Is there a way I can block it? (my laptops not working so I can't watch on there!) okay thanks. :P x

Try phonesheriff, it is smart parental control app that can block unwanted sites: