I can't speak with any authority (can't prove a negative, etc.), but this doesn't seem like a setting that Apple would give 3rd party apps the ability to modify. Sure, Settings.app modifies it, but that doesn't mean there's public API to do it. Since there's no jailbreak tag on this post, I'm gonna go ahead and assume that the asker is asking about public API. I'm gonna go with "you can't."
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
