gistfile1.inc

<?php

/* 
I use this function for every single WP project. 
It's essentially a drop-in way for a surefire, reliable, primary navbar.
Pages with a -1 index aren't shown.
Sub-level pages aren't shown either, but if you're on a sub-page the parent is given an active class.
First and last links are given classes (useful for if you're adding separators to your menu)

It's legit.

P.S. I ripped it out of my Template class, hence the public static bit. 

*/


public static function primary_nav() {
    // The site-wide navigation
    $p = get_pages(array('parent' => 0, 'sort_column' => 'menu_order', 'hierarchical' => 0));
    
    $pages = array();
    
    global $wp_query;
    if (is_page() || is_attachment() || $wp_query->is_posts_page)
        $current_page = $wp_query->get_queried_object_id();
    
    foreach ($p as $key => $page) {
        $css_class = array('page', 'page_item', 'page-item-'.$page->ID);
        
        // Handle the first link in the list
        if ($key == 0)
            $css_class[] = 'first';
        
        // Handle the last link in the list
        if ($key == (count($p) - 1))
            $css_class[] = 'last';
        
        // If we're on the current page, simply make it active
        if ($page->ID == $current_page)
            $css_class[] = 'active';
        
        if (is_single() && $page->post_name == 'blog') {
            $css_class[] = 'active';
        }
        
        // If we're on a sub page, make the parent page active.
        if (!empty($current_page)) {
            $_current_page = get_page($current_page);
            if (isset($_current_page->ancestors) && in_array($page->ID, (array) $_current_page->ancestors))
                $css_class[] = 'active';
            elseif ($_current_page && $page->ID == $_current_page->post_parent)
                $css_class[] = 'active';
        } elseif ($page->ID == get_option('page_for_posts')) {
            $css_class[] = 'active';
        }
        
        $subnav = unserialize(base64_decode(get_post_meta($page->ID, '_subnav_description', true)));
        
        // Give pages a -1 menu order for them to not appear here
        if ($page->menu_order >= 0) {
            $pages[$key] = sprintf('<li class="%s"><a href="%s">%s <span>%s</span></a></li>', 
            implode(' ', $css_class), get_page_link($page->ID), $page->post_title, stripslashes($subnav));
        }
        
    }
    
    return implode("\n", $pages);
    
}