Gallery – Album problem

I create a sub menu following the advice showed here before ( thanks! )

1) Copy header.php from the parent theme to the child theme. Edit that file and change line 49 from:

<?php wp_nav_menu(array(‘theme_location’ => ‘header_menu’, ‘container’ => false, ‘menu_id’ => ‘navigation-menu’, ‘depth’ => 1, ‘link_before’ => ‘› ‘)); ?>

to

<?php wp_nav_menu(array(‘theme_location’ => ‘header_menu’, ‘container’ => false, ‘menu_id’ => ‘navigation-menu’, ‘link_before’ => ‘› ‘)); ?>

2) In your child theme’s stylesheet, add this:

#sidebar nav ul.sub-menu {
padding-left: 1em;
}

it worked fine but now when i create the album of the gallery they all become a submenu of the gallery and im not very happy with that, i would like to have it like in the theme, any solotion?

Also, could it be posible to have a rollover on the submenu to show or hide it?

thanks

G