how to change/remove/hide menu under installed plugins

Solution using Codes

To hide a menu from a plugin menu, you need to look for the plugin hook. And after finding the hook, remove_submenu_page() will help you to achieve the desired task done. Using the hook and the remove_submenu_page(), you can remove the submenu exactly from that plugin.

For a complete understanding of the whole, refer to the article like:

The Complete Guide To The WordPress Settings API – Tom McFarlin

Then to know how to unset something you may refer to this WPSE thread.

Easy Solution

But for an easy solution, you can use Adminize, a free WordPress plugin that will assist you to show/hide certain menu and/or services by the admin roles:

Adminize – WordPress Plugin