Pass variable in url on form submit

[eluser]Wonder Woman[/eluser]
I have an initial view, pages.php:

Code:

anchor('admin/pages/edit/'.$page->id, 'Edit').' '.anchor($page->url, 'View');
// this is for every record

This then takes you to my edit page:

Code:

echo form_open();
echo form_label('Content: ','content');
echo form_hidden('page_id', $edit->id);
echo form_textarea('content', $edit->content, 'id="content"');
echo form_submit('save', 'Save');
echo form_close();

This is the edit function in the controller:

Code:

function edit($page_id)
{
    $this->session->set_userdata('page_id', $page_id);
    $data['page_id'] = $this->session->userdata('page_id');
    $this->form_validation->set_rules('content','content','trim|required|htmlspecialchars');
    $this->form_validation->set_error_delimiters('<p class="error">* ','</p>');
        
    if($this->form_validation->run() == FALSE){
        redirect('admin/pages/edit/'.$page_id, $data);
    } else {            
        redirect('admin/pages/edit', $data);
    }
}

Hope this makes sense...