def convert_militar_time_format_to_int_minutes(list):
    """
    Convert the list of hour ranges to a list of minutes ranges.

    >>> convert_militar_time_format_to_int_minutes([['9:00', '10:00'], ['12:00', '13:00']])
    [[540, 600], [720, 780]]

    """
    result = []
    for i in list:
        hours, minutes = i[0].split(':')
        x1 = int(hours) * 60 + int(minutes)
        hours, minutes = i[1].split(':')
        x2 = int(hours) * 60 + int(minutes)
        result.append([x1, x2])
    return result