I can't guess why you need to do this but for demo's we've used things like http://iphone4simulator.com/
I want to connect an iPhone to a monitor. The lighting to vga is expensive so can I use female vga to male usb and a female to female usb to connect it to my iPhone plug?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic