WordPress 3.0 has been around for a while. One of its great features is the menu system. We can use the menu system out of the box from the WordPress administration screen. From there we can create a menu with flexible menu item configuration. The menu item can be configured to point and open specific post or page, specific category or tag, or custom URL. The good news for programmers: all of those things can be done programmatically. You can create a menu and its all configurable menu items via PHP code. This post will shows you some example on how to do it.