public function get_popular_products(){
    $popular_data = $this→db→query(‘SELECT …. ’)->result_array();
    return $popular_data;
}

$this->load->model("Popularproduct_model");
$popularproducts = $this→Popularproduct_model→get_popular_products();

array(3) {
  [0]=>
  array(34) {
    ["id"]=>
    string(1) "3"
    ["title"]=>
    string(13) "Patchouli Oil"
    ["slug"]=>
    string(15) "patchouli-oil-3"
...

$this->load->view('index', $data);