Just my 2 cents anyhow.
Sent from my ADR6300 using DroidForums
The message is old but certainly the information can be useful to many.
To hide text messages you can use Safe SMS. This is the link:
The application allows you to hide incoming and outgoing sms. Just choose the contacts you want to "protect" and the application does the rest.
You can also send text messages directly from the application and they will be invisible outside of the application.
Safe SMS is free so give it a try and you will surely love it.