This light-weight plugin helps you hide admin menu and admin bar items in Joomla back-end simply by selecting the check-boxes corresponding to said menu items and click "Save". You’ll have a simplified menu for your clients, users. That will help you hide some important menu items that you don’t want them to access, like settings page, account detail page, etc.
The plugin also has very simple interface that you will be able to understand and use in 5 minutes!
For detailed instructions on how to install and use it to Hide Admin Menu items from you Joomla! back-end, please follow this link.