Using Typecast in Query Builder or Query

Hello all, I'm having a problem when trying to typecast a value in my Postgres's DB wich is type TEXT to INT to perfom a Order By in a query.
When trying to use the standart QUERY() function I receive errors if I try using "ORDER BY option::int"

PHP Code:

$query_options = $this->query("SELECT * FROM integrador_ura_options WHERE fk_ura_id = ? ORDER BY option::int", $fk_ura_id); 


<b>Fatal error</b>:  Uncaught CodeIgniter\Format\Exceptions\FormatException: Failed to parse json string, error: &quot;Type is not supported&quot;. in /var/www/html/integrador/system/Format/Exceptions/FormatException.php:9

And i didn't find any documentation about how to do it using QueryBuilder class.