Sorry for my bad english ,but i want to take a question...
I have a problem with my website...http://www.corvinobianco.com/wordpress/
On the left sidebar i have 2 categories---"la nostra azienda" and "categorie prodotti" ..
I do not understand why each category there is always Log-in (Accedi) voice..I don't insert it...

Please help me

Tnx
and sorry for my english

what are the actual widgets you are using in the sidebar?
what are the widget contents?

My menu and my widget :

ok, so you have two custom menu's in teh left sidebar.
what ever is in those menu's will be in the sidebars.
If you haven't added a login menu item to the custom menus, then it is most likely a plugin is doing it.

So Disable all plugins and see if that fixes it. then you can re-enable them one by one till you find the culprit.

I have disable all plugins but i de problem not solved...

try swapping to the twenty eleven theme and add the same widgets in and see if the login shos then .

this in not theme related. The custom menu widget is part of wordpress.