How to use app gifting with iOS 6
If you want to gift apps for iPhone, iPad, or iPod touch, you must use the iTunes Store on a Mac or PC.
Currently, app gifting is not available from your iPhone, iPad, or iPod touch with iOS 6. However, you can gift iOS apps from the iTunes Store on a Mac or PC.
Note: You can continue to gift apps in iOS 5 and earlier.
Learn more about how to purchase and send iTunes gifts.