You'll need to make nested loops, which are kind of a pain in HTML::Template. The data structure is fairly straight-forward, but generating it usually takes some nested maps. The idea is to basically make an array slice of each output column using the @selection array of indices. Here, I've generated nested row and column loops:

use HTML::Template;

my @data = (
    [ qw/a0 a1 a2 a3 a4 a5/ ],
    [ qw/b0 b1 b2 b3 b4 b5/ ],
    [ qw/c0 c1 c2 c3 c4 c5/ ],
    [ qw/d0 d1 d2 d3 d4 d5/ ]
);
my @col_name  = qw/ col0 col1 col2 col3 col4 col5 /;
my @selection = (1, 4, 5);

my $tmpl = HTML::Template->new( filehandle => \*DATA );

my @headers = map {{ title => $_ }} @col_name[ @selection ];
my @rows    = map {{ cols => [ map {{ data => $_ }} @$_[ @selection ] 
+] }}
                @data;

$tmpl->param( headers => \@headers, rows => \@rows );
print $tmpl->output;

__DATA__
<table border=1>
  <tr>
    <TMPL_LOOP headers><th><TMPL_VAR title></th></TMPL_LOOP>
  </tr>

  <TMPL_LOOP rows>
    <tr>
      <TMPL_LOOP cols><td><TMPL_VAR data></td></TMPL_LOOP>
    </tr>
  </TMPL_LOOP>
</table>
[download]

which produces this output:

col1	col4	col5
a1	a4	a5
b1	b4	b5
c1	c4	c5
d1	d4	d5

If you're getting this data from a database, though, you can probably let the database handle the slicing of each row... either by using selectall_arrayref and its Slice option, or by just listing the required columns in the query.

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