Add rel="nofollow" to menu displayed by menu_block module I am trying to add rel="nofollow" attribute to menu links output by the menu_block module.

My core menu is called Main Menu, which I do not want to modify as it is used for main navigation. However the product level of this menu is output in the footer by Menu Block module, and it is these links I want to add an attribute to.

Thanks.
If you use different menus then:

There's a module for that(tm) Menu Attributes

If it's the same menu then things get farm more complicated as you'll have to implement some hook. Take a look at hook_menu_block_tree_alter in menu_block.api.php.