php - Admin user loses admin status -

okey, i'm working on site, , have 2 pages dont want every member see, , have tried add admin check them. problem can see 2 admin pages in menu when first logg in(as admin). if click them, throws me default page. , menu loaded default user.

here login, page arrays , page loadings:

$database = new databaseobject($host, $username, $password, $database);      if(!isset($_session['user_id']) && $_post['login']){         $username = $database->clean($_post['username']);         $password = $database->clean($_post['password']);          $result = $database->query("select id, admin, username, password users username='$username' limit 1");         try{             if($database->num_rows($result) == 0){                 throw new exception ('user not exist!');             }              $user = $database->fetch($result);             $user_type = $user['admin'];             if(sha1($password) != $user['password']){                 throw new exception('invalid password!');                 echo "sha1($password)";                 echo ".$user.['password']";             }             $_session['user_id'] = $user['id'];         }            catch (exception $e){             echo $e->getmessage();         }     }  // if user logged in, load data , select page if(isset($_session['user_id'])) {     require('user.php');     $player = new user($_session['user_id'], $database);     $default_page = 'profile';          // check if user admin         if($user_type == 1){         $pages = array(             'profile' => array(                 'name' => 'profile',                 'file' => 'profile.php',                 'function' => 'profile',             ),             'arena' => array(                 'name' => 'battle arena',                 'file' => 'arena.php',                 'function' => 'arena',             ),             'weapon_shop' => array(                 'name' => 'weapon shop',                 'file' => 'weaponshop.php',                 'function' => 'weaponshop',             ),             'alchemy_store' => array(                 'name' => 'alchemy store',                 'file' => 'healingshop.php',                 'function' => 'healingshop',             ),             'create_monster' => array(                 'name' => 'create monster',                 'file' => 'monsterpages.php',                 'function' => 'createmonster',             ),             'create_weapon' => array(                 'name' => 'add new weapon',                 'file' => 'weaponpages.php',                 'function' => 'createweapon',             ),         );      }         else{             $pages = array(             'profile' => array(                 'name' => 'profile',                 'file' => 'profile.php',                 'function' => 'profile',             ),             'arena' => array(                 'name' => 'battle arena',                 'file' => 'arena.php',                 'function' => 'arena',             ),             'weapon_shop' => array(                 'name' => 'weapon shop',                 'file' => 'weaponshop.php',                 'function' => 'weaponshop',             ),             'alchemy_store' => array(                 'name' => 'alchemy store',                 'file' => 'healingshop.php',                 'function' => 'healingshop',             ),             );         }             if(!empty($_get['page'])) {         $page = strtolower(trim($_get['page']));          if(isset($pages[$page])) {             require($pages[$page]['file']);             echo "<p class='pagetitle'>" . $pages[$page]['name'] . "</p>";             $self_link = '?page=' . $page;             $pages[$page]['function']();         }         else {             require($pages[$default_page]['file']);             echo "<p class='pagetitle'>" . $pages[$default_page]['name'] . "</p>";             $self_link = '?page=' . $default_page;             $pages[$default_page]['function']();         }     }     else {         require($pages[$default_page]['file']);         echo "<p class='pagetitle'>" . $pages[$default_page]['name'] . "</p>";         $self_link = '?page=' . $default_page;         $pages[$default_page]['function']();     }      } 

and use fill menu links:

    <div id='menu'>         <ul> <?php   foreach($pages $id => $page){             echo "<li><a href='?page={$id}'>" . $page['name'] . "</a></li>";         } ?>         </ul>     </div> 

any solve appreciated! time , reading.