Hi aev,
Unfortunately, there currently isn't a way you can hide a menu group. The best solution would be to make each section admin only. You can also hide each section from all users by changing the value 'menuHidden' to 1 in the schema file, which you can find in the directory: cmsAdmin/data/schema/<table name>.ini.php
Let me know if you have any questions.
Thanks
Greg
Greg Thomas
PHP Programmer - interactivetools.com