Right to left support can be added using the bootstrap-rtl or any other rtl css file. For bootstrap rtl, You can enqueue the rtl css file to acheive RTL.
$pdocrud = new PDOCrud();//create object of PDOCrud Class
$pdocrud->enqueueCss("bootstrap-rtl", "https://cdnjs.cloudflare.com/ajax/libs/bootstrap-rtl/3.2.0-rc2/css/bootstrap-rtl.min.css");
echo $pdocrud->dbTable("orders")->render(); // call render function on database table