how to get and use codeigniter cookies ?

[eluser]Pokhara[/eluser]
I am trying to use codeigniter cookies so that i can bookmark some topic , i don't know how to get cookies vale and use it to display bookmarked item in the user browser , it doesn't work when i try to display cokies value using print_r(); please help how to proceed. Thanks

Code:

function index(){
    $this->load->helper('cookie');

    $data['title'] = 'some bookmark';
    $cookie = array(
        'name' =>'mycookie',
        'value' => 'some val',
        'expire' => '86500',
        'domain' => '.localhost',
        'path' => '/',
        'prefix' => 'something_'
    );

    set_cookie($cookie);

    $this->load->view('bookmark', $data);

}

[eluser]seanloving[/eluser]
I don't see a print_r() statement.