get category name in admin screen

add_action( 'admin_menu', 'add_custom_submenus', 9999 );
function add_custom_submenus()
{
    global $submenu;

    if( isset($_GET['post']) && get_post($_GET['post']) && isset($_GET['action']) && 'edit' == $_GET['action'] )
        $post = get_post($_GET['post']);

    if( isset($post) 
        && !empty($post->post_type)
        && is_object_in_taxonomy($post->post_type, 'category') 
    ){
        foreach ( (array) get_the_category($post->ID) as $cat )
        {
            if ( empty($cat->slug ) )
                continue;

            $submenu['edit.php'][] = array(
                __('Back'), // menu title
                'edit_posts', // menu cap
                'edit.php?category_name=" . $cat->slug // menu link
            );
        }
    }
}