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$sql = "SELECT *, (SELECT name FROM " . DB_PREFIX . "filter_group_description fgd WHERE f.filter_group_id = fgd.filter_group_id AND fgd.language_id = '" . (int)$this->config->get('config_language_id') . "') AS `group` FROM " . DB_PREFIX . "filter f LEFT JOIN " . DB_PREFIX . "filter_description fd ON (f.filter_id = fd.filter_id) WHERE fd.language_id = '" . (int)$this->config->get('config_language_id') . "'";

if (!empty($data['filter_name'])) {
	$sql .= " AND fd.name LIKE '" . $this->db->escape($data['filter_name']) . "%'";
}

$sql .= " ORDER BY f.sort_order ASC";

if (isset($data['start']) || isset($data['limit'])) {
	if ($data['start'] < 0) {
		$data['start'] = 0;
	}					

	if ($data['limit'] < 1) {
		$data['limit'] = 20;
	}	

	$sql .= " LIMIT " . (int)$data['start'] . "," . (int)$data['limit'];
}

$query = $this->db->query($sql);

return $query->rows;