This module allows you to upload an image in the menu-item's configuration form. The uploaded image is added as an background image to the menu item.
After installing the module you can configure its global settings by navigating to: admin/settings/micons. Uploading an image for a menu-item can be done at the menu items settings form (e.g.: admin/build/menu/item/1/edit).
The text of the menu item can be hidden by the adding the following CSS code to your theme's stylesheet:
.micons { display: block; overflow: hidden; padding-left: 100%; }