To add icons like  to your menus you can add the class for the icon to the “title” attribute in “Appearance -> Menus” editor.

If you have turned on the Font Awesome CDN you can use the full “fa fa-iconclass” declaration here to use the icon. Native Bootstrap 3 glyphicons only need the icon declaration as the nav walker automatically handles the first “glyphicon.”

fontawesomemenu

glyphicon