OpenCart 2: Show all subcategories in category module by default (php)

Question

Really need your help to make this work. I'm using OpenCart 2.0.3.1 and I want the sidebar category module to show all subcategories of all categories by default. Currently the module shows subcategories only when you click on a category and it shows subcategories only of that category. You can have a look at it in action:

http://demo.opencart.com/index.php?route=product/category&path=20

(it's the module on left sidebar)

I'm just using the default module. I tried many different ways to get this work and nothing helped to achieve this. I know that I need to edit these two files: catalog/controller/module/category.php

catalog/view/theme/default/template/module/category.tpl

<div class="list-group">
  <?php foreach ($categories as $category) { ?>
  <?php if ($category['category_id'] == $category_id) { ?>
  <a href="<?php echo $category['href']; ?>" class="list-group-item active"><?php echo $category['name']; ?></a>
  <?php if ($category['children']) { ?>
  <?php foreach ($category['children'] as $child) { ?>
  <?php if ($child['category_id'] == $child_id) { ?>
  <a href="<?php echo $child['href']; ?>" class="list-group-item active">&nbsp;&nbsp;&nbsp;- <?php echo $child['name']; ?></a>
  <?php } else { ?>
  <a href="<?php echo $child['href']; ?>" class="list-group-item">&nbsp;&nbsp;&nbsp;- <?php echo $child['name']; ?></a>
  <?php } ?>
  <?php } ?>
  <?php } ?>
  <?php } else { ?>
  <a href="<?php echo $category['href']; ?>" class="list-group-item"><?php echo $category['name']; ?></a>
  <?php } ?>
  <?php } ?>
</div>

Any help apprieciated, Cheers

Answer 1

Here, if I get your question correctly, You want to display all the subcategories automatically on the page, instead of only displaying subcategories of the category of the current page.

Copy these codes to your system

The Controller: catalog/controller/module/category.php

<?php
class ControllerModuleCategory extends Controller {
    public function index() {
        $this->load->language('module/category');

        $data['heading_title'] = $this->language->get('heading_title');

        if (isset($this->request->get['path'])) {
            $parts = explode('_', (string)$this->request->get['path']);
        } else {
            $parts = array();
        }

        if (isset($parts[0])) {
            $data['category_id'] = $parts[0];
        } else {
            $data['category_id'] = 0;
        }

        if (isset($parts[1])) {
            $data['child_id'] = $parts[1];
        } else {
            $data['child_id'] = 0;
        }

        $this->load->model('catalog/category');

        $this->load->model('catalog/product');

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

        $categories = $this->model_catalog_category->getCategories(0);

        foreach ($categories as $category) {
            $children_data = array();

            //if ($category['category_id'] == $data['category_id']) { 
                $children = $this->model_catalog_category->getCategories($category['category_id']);

                foreach($children as $child) {
                    $filter_data = array('filter_category_id' => $child['category_id'], 'filter_sub_category' => true);

                    $children_data[] = array(
                        'category_id' => $child['category_id'],
                        'name' => $child['name'] . ($this->config->get('config_product_count') ? ' (' . $this->model_catalog_product->getTotalProducts($filter_data) . ')' : ''),
                        'href' => $this->url->link('product/category', 'path=' . $category['category_id'] . '_' . $child['category_id'])
                    );
                }
            //}

            $filter_data = array(
                'filter_category_id'  => $category['category_id'],
                'filter_sub_category' => true
            );

            $data['categories'][] = array(
                'category_id' => $category['category_id'],
                'name'        => $category['name'] . ($this->config->get('config_product_count') ? ' (' . $this->model_catalog_product->getTotalProducts($filter_data) . ')' : ''),
                'children'    => $children_data,
                'href'        => $this->url->link('product/category', 'path=' . $category['category_id'])
            );
        }

        if (file_exists(DIR_TEMPLATE . $this->config->get('config_template') . '/template/module/category.tpl')) {
            return $this->load->view($this->config->get('config_template') . '/template/module/category.tpl', $data);
        } else {
            return $this->load->view('default/template/module/category.tpl', $data);
        }
    }
}

The View file: catalog/view/theme/default/template/module/category.tpl

<div class="list-group">
  <?php foreach ($categories as $category) { ?>
  <?php //if ($category['category_id'] == $category_id) { ?>
  <a href="<?php echo $category['href']; ?>" class="list-group-item active"><?php echo $category['name']; ?></a>
  <?php if ($category['children']) { ?>
  <?php foreach ($category['children'] as $child) { ?>
  <?php if ($child['category_id'] == $child_id) { ?>
  <a href="<?php echo $child['href']; ?>" class="list-group-item active">&nbsp;&nbsp;&nbsp;- <?php echo $child['name']; ?></a>
  <?php } else { ?>
  <a href="<?php echo $child['href']; ?>" class="list-group-item">&nbsp;&nbsp;&nbsp;- <?php echo $child['name']; ?></a>
  <?php } ?>
  <?php } ?>
  <?php } ?>
  <?php /*} else { ?>
  <a href="<?php echo $category['href']; ?>" class="list-group-item"><?php echo $category['name']; ?></a>
  <?php }*/ ?>
  <?php } ?>
</div>

As you can see in the files, I noted out the statements that are preventing the subcategories from displaying by default.