# assuming CGI.pm loaded
# this function covers only the named parameter style
# with '-name' names
sub checkbox_group {
    my %opt = @_;

    $opt{-values} ||= [];
    $opt{-labels} ||= { map{($_,$_)} @{$opt{-values}} };
    defined $opt{-default} or
            $opt{default} = '';

    $opt{-name} or return;

    my $i=time;

    return map {
        my $id = $opt{-name}.$i++;
        CGI::checkbox(
            -name => $opt{-name},
            -id => $id,
            -value => $_,
            -label => '',#disbale CGI.pm labeling
            ($opt{-default} eq $_ ? (-checked=>1) : () )
        ),
        qq#<label for="$id">$opt{-labels}{$_}</label># #our "real" labeling
    } @{$opt{-values}};
}

print checkbox_group(

    -name => 'foo',
    -values => [qw/a b c/],
    -labels => {a=>'A',b=>'<a href="b">B</a>',c=>'C'},
    -default => 'a',

);