iOS 7: How to turn off camera's burst mode?
According to this article, there is no way to turn off burst mode.


  This can be quite handy for catching just the right shot. However, for those of you that had learned to stabilize your camera by holding down the shutter button instead of tapping it, this can result in a lot of unexpected pictures. This feature appears to be enabled full-time whether you want it or not, so we'll all need to simply learn to adapt. Or delete. A lot.


Here are a couple of alternatives:


Tap the shutter button instead of pressing it for long
Use third party camera apps