yeah dude i mean the only way ur gonna get it like that is to jailbreak it and yes its very laggy, and not such a wise choice since its breaks your UELA and i assume you are trying to get your app approved by apple, so then you'd have to be showing them. They'd be like hey, this is impossible without jailbreaking, he must have jailbroken that iphone, we need to sue him for 25 grand, quick jeremy, call my lawyer!
So yeah its probably not the best idea, well, u can take screen shots of it, and display those if u google how to, cuz i forget, but its perfectly legal too. just upload those to ur computer. oh btw, if you dont have a mac that you're bringing, try to borrow a friends, it might get you brownie points. 😀