Session checking & loading a new view depending on the result

[eluser]Bramme[/eluser]
You could do something like this in your controller.

Code:

if($this->session->userdata('login') == TRUE) {
    $data['sidebar'] = $this->load->view('welcome', '', TRUE);
} else {
    $data['sidebar'] = $this->load->view('login', '', TRUE);
}
$this->load->view('page', $data);

Then just echo $sidebar in your view where you want your login form OR welcome message.