Dynamic navs

functions.php

/*
 * Filters all menu item URLs for a ##anchor-link
 */
function bl_dynamic_menu_items( $menu_items ) {
	$current_page = "http://{$_SERVER['HTTP_HOST']}{$_SERVER['REQUEST_URI']}";

	foreach ( $menu_items as $menu_item ) {
// All the blcontact shortcodes to be used as the URL of custom links.
			// Must include a ## before the shortcode. E.g., ##[blcontact type='misc1']
			if ( startsWith($menu_item->url, '##%5Bblcontact') && endsWith($menu_item->url, '%5D') ) {
				$menu_item->url = str_ireplace("##",'',$menu_item->url);
				$shortcode = urldecode($menu_item->url);
				//fb_log('sc: '.$shortcode);
				$menu_item->url = do_shortcode($shortcode);

			} else {

				if ( startsWith($menu_item->url, '##url##/') ) {
					$urllen = strlen($menu_item->url);
					$menu_item->url = get_bloginfo('url') . '/' . substr($menu_item->url,8,$urllen-8);
				}
			}
			$menu_item->url = str_ireplace("##", "#", $menu_item->url);
	}
	return $menu_items;
}
add_filter( 'wp_nav_menu_objects', 'bl_dynamic_menu_items' );