I had that option before and the recent update messed all my settings up:( now I can't hide my texts. I don't want people at work seeing my texts. I have my phone locked but everyone still can read them. I also don't have the option hide preview which was there before!
In iOS 5, go to Settings > Notifications > Messages. Turn off 'View in Lock Screen'. It makes it so that iMessage/text message notifications don't show up on the lock screen.
protected by bmike♦ Apr 17 '15 at 2:32
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