Reformat menu options. #drupal #menu

module.php

<?php

function MODULE_form_node_form_after_build($form) {
  $menu_form = &$form['menu'];
  $menu_form = MODULE_node_form_reformat_menus($menu_form);
}

/**
 * Reformats parent menu selects.
 */
function MODULE_node_form_reformat_menus($element) {
  if(isset($element['link']['parent'])) {
    MODULE_menu_parent_reformat_option_labels($element['link']['parent']);
  }
  if(isset($element['nodesymlinks']['items'])) {
    foreach(element_children($element['nodesymlinks']['items']) as $key) {
      MODULE_menu_parent_reformat_option_labels($element['nodesymlinks']['items'][$key]['parents']);
    }
  }
  return $element;
}

/**
 * Converts <menu> options in unselectable option groups and reformats indents.
 */
function MODULE_menu_parent_reformat_option_labels(&$element) {
  $current_group = null;
  $options = array();
  foreach($element['#options'] as $key => $label) {
    if($label[0] === '<') {
      $group_label = str_replace(array('<', '>'), '', $label);
      $options[$group_label] = array();
      $current_group = &$options[$group_label];
      continue;
    }
    $label = str_replace('-- ', '', $label);
    $label = str_replace('--', '- ', $label);
    if(!is_null($current_group)) {
      $current_group[$key] = $label;
      continue;
    }
    $options[$key] = $label;
  }
  $element['#options'] = $options;
}