404 ERROR

PAGES CONTROLLER
 public function index(){

   $data['pages'] = $this->pages_model->get_pages();
   $data['news'] = $this->news_model->get_news();
                 $this->load->view('header',$data);
         $this->load->view('page_name', $data);
             $this->load->view('footer', $data);
  }
//this is used to view selected page
public function view_page($slug = ''){
         $data['pages'] = $this->pages_model->get_selected_page($slug);
         $this->load->view('incs/header',$data);
         $this->load->view('page_name', $data);
             $this->load->view('footer', $data);

      }

PAGE VIEW
<?php
//navigation section
//list of page
echo'<ul>';
  foreach($pages as $page){
   echo"<li><a href='/pages/".$page['slug']."'>".$page['name']."</a></li>";
  echo'</ul>';
}

//news section
//list of news item
echo'<ul>';
  foreach($news as $article){
   echo"<li><a href='/news/".$article['slug']."'>".$article['heading']."</a></li>";
  echo'</ul>';
}

?>


NEWS CONTROLLER
public function view_news($slug = ''){

            $data['article'] = $this->news_model->get_selected_news($slug);

         $this->load->view('header',$data);
         $this->load->view('news_page', $data);
             $this->load->view('footer', $data);

      }

NEWS VIEW
 <?php
     foreach($article as $row){
     echo $row['content'];

     }
ROUTES
route['news/(:any)'] = 'news/view_news/$1';
$route['news'] = 'news';
$route['pages/(:any)'] = 'pages/view_page/$1';
$route['default_controller'] = 'pages';