Excluding WordPress Pages

function exclude_navigation_pages($exclude_array) {
    global $wpdb;
    $post = $wpdb->get_var($wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type='page'", "Museum"));
    if($post) {
        $nav_ids = array($post);
    }
    elseif($_SERVER["SERVER_NAME"] == "localhost.tld") {
        $nav_ids = array(140);
    }
    elseif($_SERVER["SERVER_NAME"] == "livesite.com") {
        $nav_ids = array(127);
    }
    $exclude_merge = array_merge($nav_ids, $exclude_array);

    return $exclude_merge;
}
add_filter('wp_list_pages_excludes', 'exclude_navigation_pages');