<?php echo"<div class=\"container\">
  <div class=\"row\">
  <div id=\"content\" class=\"col-sm-12\">";
  		$pages_dir = 'page';
		if(!empty($_GET['page'])){
			$pages = scandir($pages_dir, 0);
			unset($pages[0], $pages[1]);

			$p = $_GET['page'];
			if(in_array($p.'.php', $pages)){
				include($pages_dir.'/'.$p.'.php');
			} else {
				include('page/404.php');
			}
		} else {
			include($pages_dir.'/awal.php');
		}
echo"</div>
    </div>
</div>";
?>