I'm not sure that you need Text::CSV to get the output you want. The following subroutine will do what you describe:

sub combine_rows
{
    my ( $label, @arrays ) = @_;

    my @joined;
    for my $i ( 0 .. $#{$arrays[0]} ) {  # assumes that all arrays are
+ the same size
        push @joined, join( ';', $label, map { $arrays[$_][$i] } 0 .. 
+$#arrays );
    }
    return \@joined;
}
[download]

Here's how you would use the subroutine:

@ports = qw( portname portID port802 );
@val1 = qw( ON ON OFF );
@val2 = qw( EX EX NEX );

my $joined = combine_rows( "ports", \@ports, \@val1, \@val2 );

print "$_\n" for ( @$joined );
[download]

Now, it would be a little more complicated if your input array values can contain the semi-colon character as data. In that case, you need to escape or quote the field values in the subroutine. (That's the sort of thing Text::CSV would do for you if you used it properly, but it's not that complicated to do on your own.)

The reason I use "map" in the subroutine is to allow it to join any number of parallel arrays (not just exactly 3, as in your "@ports, @val1, @val2" example). If you can't figure out what "map" is doing there, it's just a nested loop to get the $i'th value of each input array.

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