Development > Membership, permissions and security > UI personalization > Personalizable parts of CMS Desk:
CMS Desk -> Administration tab
You can hide all items in the left Administration menu.
The Administration module has UI elements with the same names as the menu items in the screenshot above.
Page url: http://devnet.kentico.com/docs/devguide/index.html?ui_personalization_cms_desk_administration_tab.htm