Вывел.
Получается, что дополнил
'name' => $category['name'],
на
'name' => $category['name'] . ($this->config->get('config_product_count') ? ' (' . $this->model_catalog_product->getTotalProducts($filter_data) . ')' : ''),
Потом перед
$data['categories'][] = array(
добавил
$filter_data = array(
'filter_category_id' => $category['category_id'],
'filter_sub_category' => true
);
Вот готовый код, если кому-то понадобится:
P.S. Скорость загрузки сайта такая же.
// Menu
$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['top']) {
// Level 2
$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(
'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
);
// Level 1
$data['categories'][] = array(
'name' => $category['name'] . ($this->config->get('config_product_count') ? ' (' . $this->model_catalog_product->getTotalProducts($filter_data) . ')' : ''),
'children' => $children_data,
'column' => $category['column'] ? $category['column'] : 1,
'href' => $this->url->link('product/category', 'path=' . $category['category_id'])
);
}
}
$data['language'] = $this->load->controller('common/language');
$data['currency'] = $this->load->controller('common/currency');
$data['search'] = $this->load->controller('common/search');
$data['cart'] = $this->load->controller('common/cart');