get uri segment for load view

[eluser]Unknown[/eluser]
dear all i have case about uri segment

my url like this:

Code:

localhost/blog/contact

but i cannot load contact

this my controller:

Code:

$request_page = $this->uri->segment(1);
            if($request_page=='contact'){
                    $this->contact();
            }
    function contact()
     {
                $this->load->view('contact');
     }

how i can be load contact using model like that