$items['sc/achievement/%achievement_file_arg'] = array(
  'title' => "Show An Achievement",
  'page callback' => 'generate_achievement',
  'access arguments' => array('access stepcounter content'),
  'page arguments' => array(2),
  'type' => MENU_CALLBACK,
  // 'type' => MENU_NORMAL_ITEM,
  );

  $items['sc/achievements/%achievement_file_arg/%'] = array(
  'title' => "Show Achievements",
  'page callback' => 'generate_achievement',
  'access arguments' => array('access stepcounter content'),
  'page arguments' => array(2,3),
  'type' => MENU_CALLBACK,
  // 'type' => MENU_NORMAL_ITEM,
  );

  $items['sc/achievements/%'] = array(
  'title' => "Show number Achievement",
  'page callback' => 'generate_achievement',
  'access arguments' => array('access stepcounter content'),
  'page arguments' => array(2),
  'type' => MENU_CALLBACK,
  // 'type' => MENU_NORMAL_ITEM,
  );

  $items['sc/achievements/x'] = array(
  'title' => "Show x Achievement",
  'page callback' => 'generate_achievement',
  'access arguments' => array('access stepcounter content'),
  // 'type' => MENU_CALLBACK,
  'type' => MENU_NORMAL_ITEM,

  return $items;
}