Even though you can’t hide the fact that you have received a text message, you can at least hide the actual message so someone can’t read that your wife is mad at you because you didn’t talk to her enough the night before! To do this, you just turn off message previews. You can do this by going to Settings, Notifications, Messages and then toggling Show Preview to Off.
And that’s about it! Those are my favorite tips and tricks for the iPhone. Hope you enjoy them. Tell us what your favorite shortcuts are in the comments. Enjoy!
"iPhone Tip – Hide Text Message Content"
Reference : online-tech-tips.com