diff --git a/menu_attributes.install b/menu_attributes.install
index 14c80fe..2917a11 100644
--- a/menu_attributes.install
+++ b/menu_attributes.install
@@ -28,6 +28,7 @@ function menu_attributes_uninstall() {
     variable_del("menu_attributes_{$attribute}_enable");
     variable_del("menu_attributes_{$attribute}_default");
   }
+  variable_del('menu_attributes_menus');
 }
 
 /**
diff --git a/menu_attributes.module b/menu_attributes.module
index 6b0cdde..bce4adf 100644
--- a/menu_attributes.module
+++ b/menu_attributes.module
@@ -132,6 +132,60 @@ function menu_attributes_get_menu_attribute_info() {
 /**
  * Implements hook_form_FORM_ID_alter().
  *
+ * Adds menu attribute options to the edit menu form.
+ */
+function menu_attributes_form_menu_edit_menu_alter(&$form, $form_state) {
+  $menu_name = $form['menu_name']['#default_value'];
+  $attributes = variable_get('menu_attributes_menus', array());
+
+  // Set default attributes.
+  $default_attributes = !empty($attributes[$menu_name]) ? $attributes[$menu_name] : array('id' => '', 'class' => 'menu');
+
+  $form['attributes'] = array(
+    '#type' => 'fieldset',
+    '#title' => t('Attributes'),
+    '#collapsible' => TRUE,
+    '#collapsed' => TRUE,
+    '#tree' => TRUE,
+  );
+  $form['attributes']['id'] = array(
+    '#type' => 'textfield',
+    '#title' => t('ID'),
+    '#default_value' => $default_attributes['id'],
+  );
+  $form['attributes']['class'] = array(
+    '#type' => 'textfield',
+    '#title' => t('Classes'),
+    '#default_value' => $default_attributes['class'],
+  );
+
+  $form['#submit'][] = '_menu_attributes_menu_form_submit';
+}
+
+/**
+ * Form submit handler for menu.
+ *
+ * Save menu attributes in variable.
+ */
+function _menu_attributes_menu_form_submit($form, &$form_state) {
+  $values = $form_state['values'];
+
+  // Adds 'menu-' prefix if menu has been created.
+  $menu_name = !empty($values['old_name']) ? $values['menu_name'] : 'menu-' . $values['menu_name'];
+
+  $attributes = variable_get('menu_attributes_menus', array());
+
+  // Store attributes in variable.
+  $attributes[$menu_name] = array(
+    'id' => $values['attributes']['id'],
+    'class' => $values['attributes']['class'],
+  );
+  variable_set('menu_attributes_menus', $attributes);
+}
+
+/**
+ * Implements hook_form_FORM_ID_alter().
+ *
  * Adds menu attribute options to the edit menu item form.
  *
  * @see menu_edit_item()
@@ -351,3 +405,34 @@ function menu_attributes_preprocess_menu_link(&$variables) {
     unset($options['item_attributes']);
   }
 }
+
+/**
+ * Implements hook_theme_registry_alter().
+ */
+function menu_attributes_theme_registry_alter(&$registry) {
+  array_unshift($registry['menu_tree']['preprocess functions'], 'menu_attributes_prepreprocess_menu_tree');
+  $registry['menu_tree']['function'] = 'menu_attributes_menu_tree';
+}
+
+/**
+ * Prepares variables for theme_menu_tree().
+ */
+function menu_attributes_prepreprocess_menu_tree(&$variables) {
+  $first_element_key = current(element_children($variables['tree']));
+  $first_element = $variables['tree'][$first_element_key];
+  $variables['menu_name'] = $first_element['#original_link']['menu_name'];
+  $variables['depth'] = $first_element['#original_link']['depth'];
+}
+
+/**
+ * Implements theme_menu_tree().
+ */
+function menu_attributes_menu_tree($variables) {
+  $menus = variable_get('menu_attributes_menus', array());
+  $attributes = array('class' => 'menu');
+  if (!empty($menus[$variables['menu_name']]) && $variables['depth'] == 1) {
+    $attributes = array_filter($menus[$variables['menu_name']]);
+  }
+
+  return '<ul' . drupal_attributes($attributes) . '>' . $variables['tree'] . '</ul>';
+}