load different views according to select option - codeigniter

Question

VIEW:
Payment Method:
<select name="payment" id="payment">
<option value=""> --- Select ---</option>
<option value="cash">Cash on Delivery</option>
<option value="online">Digital/Online Payment</option>
</select>
</label><?php echo form_error('payment'); ?></td>
</tr>
CONTROLLER:
public function save_order()
{
$this->load->library('form_validation');
$this->form_validation->set_rules('name', 'name', 'required|trim|max_length[50]');
$this->form_validation->set_rules('phone', 'phone', 'required|trim|is_numeric|min_length[9]');
$this->form_validation->set_rules('time', 'time', 'required');
$this->form_validation->set_rules('location', 'location', 'required');
$this->form_validation->set_rules('address', 'address', 'required|trim|xss_clean|max_length[300]');
$this->form_validation->set_rules('payment', 'payment', 'required');
$this->form_validation->set_error_delimiters('<br /><span class="error">', '</span>');
if ($this->form_validation->run() == TRUE && ($payment = "cash"))
{
$this->load->view('billing_view');
else
{
$this->load->view('billing_view2');
}
I am trying to load different pages according to the select options in the form and it doesn't seem to be working.
Suggestions please??

Answer 1

public function save()
{
//If form validation returns false,
//call the index method(form) and return from the method
//so nothing else gets executed
if(!$this->form_validation->run()){
return $this->index();
}
$payment = $this->input->post("payment");
//If payment type is == cash
//load the view called cash and return from method
//so nothing else gets executed
if($payment == "cash"){
return $this->load->view('cash');
}
//default method behaviour if none of the above
//are true.
return $this->load->view("digital");
}