Pretty major update to better support several options:

* Added a white border at the top of the drop-downs in original
* Optimized the "view" test for simplemenu
* Enhanced the init() function by creating sub-functions and
  moving the footer functionality in it
* The list of themes is now dynamically generated from the
  simplemenu themes folder
* The list of superfish now includes a 'custom' so the code may
  come from another module or theme
* The Simplemenu variable can now be moved to the header and
  cache in its own JS file
* Create a Devel and Inactive Parents modules for additional
  functionality
* Moved the simplemenu modules in the Menu package
* Changed the function generating the menu so other modules may
  tweak the menu if so they wish
* Moved the support for Devel in a separate sub-module.
  (this is with the new way of doing things & has a corresponding
  update hook to tell users about the change. It is actually a good
  example of using the new hook system!)

simplemenu_inactive_parents.module

@@ -0,0 +1,62 @@
+<?php
+// $Id$
+
+/**
+ * @file
+ * Make all the simplemenu parent menu items non-clickable.
+ */
+
+/**
+ * \brief Alter the menu item link theme registry.
+ *
+ * This function grabs the simplemenu theme registry for the
+ * menu_item_link theming. This gives us a way to remove the
+ * link and replace it with a name (anchor) instead.
+ *
+ * This is only applied to the Simplemenu as intefering with
+ * other menus could have unwanted side effects.
+ *
+ * \note
+ * This is called at the time the theme registry is built.
+ * It is then put in the cache until next time the registry
+ * is built by the system (i.e. caches are cleared by user,
+ * because a module is installed, etc.)
+ */
+function simplemenu_theme_registry_alter(&$theme_registry) {
+  global $theme;
+
+  // Save theme function
+  $themes = variable_get('simplemenu_theme_function', array());
+  $themes[$theme] = $theme_registry['menu_item_link']['function'];
+  variable_set('simplemenu_theme_function', $themes);
+
+  // Replace with our own
+  $theme_registry['menu_item_link']['function'] = 'simplemenu_theme_menu_item_link';
+}
+
+/**
+ * \brief Transform the menu item link.
+ *
+ * This function intercepts the menu item link theming function of
+ * the system and 
+ */
+function simplemenu_theme_menu_item_link($link) {
+  global $theme;
+
+  // this is a drop down?
+  if (!empty($link['has_children']) && variable_get('simplemenu_running', FALSE)) {
+    return '<a name="menu-id-' . $link['mlid'] . '">' . $link['title'] . '</a>';
+  }
+
+  // got a theme function?
+  $themes = variable_get('simplemenu_theme_function', array());
+  if (isset($themes[$theme])) {
+    return $themes[$theme]($link);
+  }
+
+  // somehow the preprocess function did not get called?!
+  // use the core default
+  return theme_menu_item_link($link);
+}
+
+// vim: ts=2 sw=2 et syntax=php