字符串在URL opencart链接上转换为Array

Question

I have some code in the category.php of opencart to interact with my module, i need to pass an array as string to the URL but i'm missing something, it appears that opencart has a function that keeps converting the string to array again...

here is my code

//MOD EOT - Adicionar os campos dos Filtros
if (isset($this->request->get['eot_filter'])) { 
    $eot_filters_url = $this->request->get['eot_filter'];               
    //$final_url = '';
    foreach ($eot_filters_url as $key=>$filter) {
        $final_url = '&eot_filter['.$key.'][Attr_id]='. $filter['Attr_id'];
        $final_url.= '&eot_filter['.$key.'][text]='.  $filter['text'];  

        $url .= $final_url;

    }
}
//MOD EOT END - Adicionar os campos dos Filtros

$pagination = new Pagination();
$pagination->total = $product_total;
$pagination->page = $page;
$pagination->limit = $limit;
$pagination->url = $this->url->link('product/category', 'path=' . $this->request->get['path'] . $url . '&page={page}');

the $pagination->url puts &eot_filter=array instead of &eot_filter[0][Attr_id]=...