/*
|MODELS
||usersdb.php
|CONTROLLERS
||users.php

the model and controller can then have different methods eg, add a user, remove a user, view all users etc.
*/


class Usersdb extends Model
{
  /**
   * The Initialisation method
   */

  function Usersdb()
  {
    parent::Model();
  }
  function add($name)
  {
    ...
  }
  function delete($userid)
  {
    ...
  }
} 



class User extends Controller {

  function User()
  {
    parent::Controller();
    $this->load->model('usersdb');
    $this->load->scaffolding('users');
  }
  function add()
  {
     $name = 'test';
     $res = $this->usersdb->add($name);
     $data['res'] = $res;
     $this->load->view('users/user_add_v', $data);
  }
  function delete($id)
  {
     $res = $this->usersdb->delete($id);
     $data['res'] = $res;
     $this->load->view('users/user_remove_v', $data);
  } 




/*
so to add a user you would use the URL

whatever.com/codeigniter/index.php/user/add
*/

http://codeigniter.com/forums/viewthread/76840/

CI sample models / controlers structure

PHP