def text_urldata(urldata):
    """
    Convert ``urldata`` into text.

    :param urldata: a dictionary mapping bytes to lists of bytes.

    :return: a dictionary mapping text to lists of text.
    """
    return dict([(k.decode("utf-8"), [vv.decode("utf-8") for vv in v])
                 for [k, v] in urldata.items()])