for (0.. $#{$self->session->param('item')} ) {
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gives you the indices into the array in $_ . But you might want

for (@{$self->session->param('item')}) {
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to iterate over the elements themselves (in $_).

You could as well take a reference to the array and use that:

my $ary = $self->session->param('item');

for (@$ary) {
    ...
}
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_($_=" "x(1<<5)."?\n".q·/)Oo.  G°\        /
                              /\_¯/(q    /
----------------------------  \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}