display from database

[eluser]new kid[/eluser]
i hav set session in login page by
$this->session->set_userdata('$role');

$role is from database

then i used ur code to send the values
$data = array(
'page_title' => 'Students',
'students' => $students->result(),
'role_id' => $this->session->user_data('role_id');
);
$this->load->view('students/list',$data);

how to get this value in view
i hav to store it in a variable
please help