Как под категориями 2 го уровня вывести список подкатегорий 3 го уровня на странице?

$results = $this->model_catalog_category->getCategories($category_id);



foreach ($results as $result) {

    $filter_data = array(

        'filter_category_id'  => $result['category_id'],

        'filter_sub_category' => true

    );

    $data['categories'][] = array(

        'name' => $result['name'] . ($this->config->get('config_product_count') ? ' (' . $this->model_catalog_product->getTotalProducts($filter_data) . ')' : ''),                

        'href' => $this->url->link('product/category', 'path=' . $this->request->get['path'] . '_' . $result['category_id'] . $url)

    );





    ////////////////////////////////////Начало кода взятого из sitemap.php//////////////////////////////////////////

    $data['categories'] = array();



    $categories_1 =  $this->model_catalog_category->getCategories($category_id);



    foreach ($categories_1 as $category_1) {

        $level_2_data = array();



        $categories_2 = $this->model_catalog_category->getCategories($category_1['category_id']);



        foreach ($categories_2 as $category_2) {

            $level_3_data = array();



            $categories_3 = $this->model_catalog_category->getCategories($category_2['category_id']);



            foreach ($categories_3 as $category_3) {

                $level_3_data[] = array(

                    'name' => $category_3['name'],

                    'href' => $this->url->link('product/category', 'path=' . $this->request->get['path'] . '_' . $category_1['category_id'] . '_' . $category_2['category_id'] . '_' . $category_3['category_id'])

                );

            }



            $level_2_data[] = array(

                'name'     => $category_2['name'],

                'children' => $level_3_data,

                'href'     => $this->url->link('product/category', 'path='. $this->request->get['path'] . '_' . $category_1['category_id'] . '_' . $category_2['category_id'])

            );

        }



        $data['categories'][] = array(

            'name'     => $category_1['name'],

            'children' => $level_2_data,

            'href'     => $this->url->link('product/category', 'path=' . $category_1['category_id'])

        );

    }

     

    ///////////////////////////////////////////////Конец кода взятього из sitemap.php///////////////////////////////////////////////



}

 <?php if ($categories) { ?>

    <h3><?php echo $text_refine; ?></h3>

    <?php if (count($categories) <= 5) { ?>

    <div class="row">

      <div class="col-sm-3">

        <ul>

          <?php foreach ($categories as $category) { ?>

          <li><a href="<?php echo $category['href']; ?>"><?php echo $category['name']; ?></a></li>

          <?php } ?>

        </ul>

      </div>

    </div>

    <?php } else { ?>

    <div class="row">

      <?php foreach (array_chunk($categories, ceil(count($categories) / 4)) as $categories) { ?>

      <div class="col-sm-3">

       <!-- <ul>-->

        <!--  <?php foreach ($categories as $category) { ?>-->

         <!-- <li><a href="<?php echo $category['href']; ?>"><?php echo $category['name']; ?></a></li>-->

 



        <!-- /////////////////////////////////Код ниже добавил я///////////////////////////////////////////////-->    

         <ul>

           <?php foreach ($categories as $category_1) { ?>

            <li><a href="<?php echo $category_1['href']; ?>"><?php echo $category_1['name']; ?></a>

              <?php if ($category_1['children']) { ?>

              <ul>

                <?php foreach ($category_1['children'] as $category_2) { ?>

                <li><a href="<?php echo $category_2['href']; ?>"><?php echo $category_2['name']; ?></a>

                  <?php if ($category_2['children']) { ?>

                  <ul>

                    <?php foreach ($category_2['children'] as $category_3) { ?>

                    <li><a href="<?php echo $category_3['href']; ?>"><?php echo $category_3['name']; ?></a></li>

                    <?php } ?>

                  </ul>

                  <?php } ?>

                </li>

                <?php } ?>

              </ul>

              <?php } ?>

            </li>

           <?php } ?>

          </ul>

        <!-- /////////////////////////////////Конец моего кода///////////////////////////////////////////////-->

           <!--   <?php } ?>-->

          <!--  </ul>



      </div>

      <?php } ?>

    </div>