No, obviously Nintendo hasn’t given up and given into the incessant demands of stock holders and begun to make games for iOS.
Instead a company called PDP have done a deal with Nintendo to produce licensed covers for the iPhone. Case designs include a golden Legend of Zelda cover, Boo, Mario Kart 7, Fire Mario, Luigi and Yoshi among others.
The cases are due out in October but pricing is yet to be confirmed. The closest you will come to having Super Mario Bros. on your iOS device. Outside of Jailbreaking your phone of course.