OpenCart 🇺🇦

$json = array();

if (isset($this->request->get['filter_name'])) {
	$this->load->model('catalog/filter');

	$data = array(
		'filter_name' => $this->request->get['filter_name'],
		'start'       => 0,
		'limit'       => 20
	);

	$filters = $this->model_catalog_filter->getFilters($data);

	foreach ($filters as $filter) {				
		$json[] = array(
			'filter_id' => $filter['filter_id'],
			'name'      => strip_tags(html_entity_decode($filter['group'] . ' > ' . $filter['name'], ENT_QUOTES, 'UTF-8'))
		);
	}
}

$sort_order = array();

foreach ($json as $key => $value) {
	$sort_order[$key] = $value['name'];
}

array_multisort($sort_order, SORT_ASC, $json);

$this->response->setOutput(json_encode($json));