How to add url field in submission listing? Need help ;)

Hi 😉 i really need help. I created website with deals, coupons etc. where users can add their deals. I almost finished but i would like change some things in submission listing. I have few fields: title, description, tags, category, file attachments. I would like to have field with url to redirect users to website with deal.
I deleted last step submission listing and now i would like to have link field between description and tags. I think i should add something in tpl-add.php.
This Is last thing which i would like to change and i will be really glad for help. lLink to my webiste: https://polskieokazje.pl/dodajokazje/
Thehe Are lines in tpl-add.php:
case “2”: { // LISTING DESCRIPTION

$field[$o][‘title’] = $CORE->_e(array(‘add’,’10’));
$field[$o][‘name’] = “post_title”;
$field[$o][‘type’] = “text”;
$field[$o][‘class’] = “form-control”;
$field[$o][‘required’] = true;
$o++;
$field[$o][‘title’] = $CORE->_e(array(‘add’,’12’));
$field[$o][‘name’] = “post_content”;
$field[$o][‘type’] = “post_content”;
$field[$o][‘class’] = “form-control”;
//$field[$o][‘required’] = true;
$o++;
$field[$o][‘title’] = $CORE->_e(array(‘add’,’71’));
$field[$o][‘name’] = “post_tags”;
$field[$o][‘type’] = “text”;
$field[$o][‘help’] = $CORE->_e(array(‘add’,’73’));
$field[$o][‘class’] = “form-control”;
echo $CORE->BUILD_FIELDS($field,$data);