'Main Menu',
'container' => 'nav',
'container_class' => '',
'container_id' => '',
'menu_class' => 'menu',
'menu_id' => '',
'echo' => true,
'fallback_cb' => '__return_false',
'before' => '',
'after' => '',
'link_before' => '',
'link_after' => '',
'items_wrap' => '
- %3$s
- %3$s