Style a menu inside a specific block I've created one menu to be placed on the left column and with context it will be repeated on the footer too.
The difference is that the footer menu has to be already expanded and show all the child.

I can use  this code below to make it as expanded

function mytheme_menu_link_alter(&amp;$item, $menu) {
    if($item['menu_name'] == 'menu-about-us')
    {
        $item['expanded'] = 1;
    }
}


How do I targer the menu in the footer?
How should I use the function mytheme_preprocess_block(&amp;$variables) ?

Thanks in advance.
What your after is the following...

context_active_contexts()


http://api.drupalize.me/api/drupal/function/context_active_contexts/7

Example:

if (module_exists('context')) {
    $active_contexts = array_keys(context_active_contexts());
    if (in_array('SOMETHING', $active_contexts)) {
       //...
    } 
}