获取category.tpl上的类别名称

I have OpenCart 2.x, I'd like to show category names on product grid of category page. I have 2 levels of category Level 1: Electronics Level 2: Electronics > Mobile Phones

I want to display level 1 (parent) category on top of image and level 2 (sub category) below price. Like below picture: category.tpl

I tried editing "category.php" directly but it is not working. in category.php added this code:

if ($category_info) {
$data['parent_cat_info'] = array();
        if($category_info['parent_id'] != 0){
            $data['parent_cat_info'] = $this->model_catalog_category->getCategory($category_info['parent_id']);
         }

and tried to access it in category.tpl

<?php 
  if($parent_cat_info){
  echo $parent_cat_info['category_id'];
  echo $parent_cat_info['name'];
 }
?>