I hope i understand your question corectly, but I think the best way to do it would be to save the taken photo in a custom album. Martin tudorov has written a tutorial on this subject which I find very useful. It is designed for iOS 5 but I don't think there is much of change and you can tweak it for iOS 6 if you want. There is a sample project as well. Anyway here is the link to the tutorial which explAns it all and I hope it helps you solve your issue.
http://www.touch-code-magazine.com/ios5-saving-photos-in-custom-photo-album-category-for-download/