Automatic Field UI menu mappings for all fieldable entity types

If your module has a fieldable entity type, it was typically up to you to implement hook_admin_menu_map(). The Fieldable Panels Panes module was a typical example:

/**
 * Implements hook_admin_menu_map().
 */
function fieldable_panels_panes_admin_menu_map() {
  $map = array();

  $bundle_keys = array();
  $info = entity_get_info('fieldable_panels_pane');
  foreach ($info['bundles'] as $bundle_name => $bundle_info) {
    $bundle_keys[] = strtr($bundle_name, '_', '-');

    // Add mapping for the individual fields if the Field UI module is enabled.
    if (module_exists('field_ui')) {
      if (isset($bundle_info['admin'])) {
        $admin_path = $bundle_info['admin']['path'];
        $fields = array();

        foreach (field_info_instances('fieldable_panels_pane', $bundle_name) as $field) {
          $fields[] = $field['field_name'];
        }

        $map["$admin_path/fields/%field_ui_menu"]['parent'] = "$admin_path/fields";
        $map["$admin_path/fields/%field_ui_menu"]['arguments'][] = array(
          '%fieldable_panels_panes_type' => array($bundle_name),
          '%field_ui_menu' => $fields,
        );
      }
    }
  }

  // Provide mapping for the individual bundles.
  $map['admin/structure/fieldable-panels-panes/manage/%fieldable_panels_panes_type'] = array(
    'parent' => 'admin/structure/fieldable-panels-panes',
    'arguments' => array(
      array('%ctools_export_ui' => $bundle_keys),
    ),
  );


  return $map;
}

But now Administration Menu provides the mappings for you. To provide support for both old versions of Administration Menu, use both hook_admin_menu_map() and hook_admin_menu_map_alter(). Optionally, you could simplify and just leave out the hook_admin_menu_map_alter() part and rely on your users to use the latest version of Administration Menu.

/**
 * Implements hook_admin_menu_map().
 */
function fieldable_panels_panes_admin_menu_map() {
  $map = array();

  $bundle_keys = array();
  $info = entity_get_info('fieldable_panels_pane');
  foreach ($info['bundles'] as $bundle_name => $bundle_info) {
    $bundle_keys[] = $bundle_name;
  }

  // Provide mapping for all bundles.
  $map['admin/structure/fieldable-panels-panes/%fieldable_panels_pane_type'] = array(
    'parent' => 'admin/structure/fieldable-panels-panes',
    'arguments' => array(
      array('%ctools_export_ui' => $bundle_keys),
    ),
  );

  return $map;
}

/**
 * Implements hook_admin_menu_map_alter().
 *
 * Add mapping for the individual fields if the Field UI module is enabled,
 * and the mappings are not already added by field_ui_admin_menu_map().
 */
function fieldable_panels_panes_admin_menu_map_alter(array &$map) {
  if (!module_exists('field_ui')) {
    return;
  }

  $bundles = array();
  $info = entity_get_info('fieldable_panels_pane');
  foreach ($info['bundles'] as $bundle_name => $bundle_info) {
    if (isset($bundle_info['admin'])) {
      $admin_path = $bundle_info['admin']['path'];

      // Fields mapping may already be supported by field_ui_admin_menu_map()
      // so only add it if it doesn't exist.
      if (isset($map["$admin_path/fields/%field_ui_menu"])) {
        continue;
      }

      $fields = array();

      foreach (field_info_instances('fieldable_panels_pane', $bundle_name) as $field) {
        $fields[] = $field['field_name'];
      }

      if (!empty($fields)) {
        $map["$admin_path/fields/%field_ui_menu"]['parent'] = "$admin_path/fields";
        $map["$admin_path/fields/%field_ui_menu"]['arguments'][] = array(
          '%ctools_export_ui' => array($bundle_name),
          '%field_ui_menu' => $fields,
        );
      }
    }
  }
}