gistfile1.txt

/application/models/productModel.php
class productModel extends CI_Models{
  function getAllProduct(){
    $query = $this->db->query("select * from `product`");
    result $query->result_array();
  }
}

/application/controllers/product.php
class product extends CI_Controller{
  function read(){
    $this->load->model('productModel');
    $data['products'] = $this->productModel->getAllProduct();
    $this->load->view('product/list');
  }
}