function pre() {
        $.ajax({
            url: "arquivo1.php",
            method: 'POST',
            dataType: 'json',
            success: function (data) {
                $.ajax({
                    url: "arquivo2.php",
                    method: 'POST',
                    dataType: 'json',
                    success: function (data2) {

                    $.each(data.id, function(i, item) {

                        $( ".lado" ).prepend("<div id='" + data.id + "'><select class='select'></select></div>");

                        if (data.id == data2.id) {
                            $( ".select" ).append("<option'>" + data2.id + "</option>");
                        }
                    });

                }
            });
        }
    });

}