diff --git a/menu_block.module b/menu_block.module
index 83cf0c9..1308a30 100644
--- a/menu_block.module
+++ b/menu_block.module
@@ -118,7 +118,8 @@ function menu_block_help($path, $arg) {
  */
 function menu_block_block_view($delta = '') {
   $config = menu_block_get_config($delta);
-  $data = menu_tree_build($config);
+  $tree = menu_tree_build($config);
+  $data = menu_tree_render($tree, $config);
   // Add contextual links for this block.
   if (!empty($data['content'])) {
     if (in_array($config['menu_name'], array_keys(menu_get_menus()))) {
@@ -245,11 +246,9 @@ function menu_block_get_config($delta = NULL) {
  *   - expanded: (boolean) Specifies if the entire tree be expanded or not.
  *   - sort: (boolean) Specifies if the tree should be sorted with the active
  *     trail at the top of the tree.
+ *
  * @return
- *   array An associative array containing several pieces of data.
- *   - content: The tree as a renderable array.
- *   - subject: The title rendered as HTML.
- *   - subject_array: The title as a renderable array.
+ *   array Menu tree after applying configuration options.
  */
 function menu_tree_build($config) {
   // Retrieve the active menu item from the database.
@@ -353,6 +352,27 @@ function menu_tree_build($config) {
     menu_tree_sort_active_path($tree);
   }
 
+  return $tree;
+}
+
+/**
+ * Renders a menu tree based on the provided configuration.
+ *
+ * @param $tree
+ *   array Menu tree after applying configuration options.
+ * @param $config
+ *   array An array of configuration options that specifies how to build the
+ *   menu tree and its title.
+ *
+ * @return
+ *   array An associative array containing several pieces of data.
+ *   - content: The tree as a renderable array.
+ *   - subject: The title rendered as HTML.
+ *   - subject_array: The title as a renderable array.
+ *
+ * @see menu_tree_build()
+ */
+function menu_tree_render($tree, $config) {
   // Render the tree.
   $data = array();
   $title = menu_block_get_title($config['title_link'], $config);
-- 
1.7.4.2