my (@ergebnisse);

my $set = ' ';

while(my @result = $sth->fetchrow_array()){
  $result[2] = '<a href=="link.pl">'.$result[2].'</a>' if($result[2] == 4);
  $set = '<img src="images/ic_parkingAvailable.gif">' if($result[2] == 4);

  my %hash = (
     ID => $result[0],
     NAME => $result[1],
     CAT => $result[2],
     CHECKED => $set,);
  push(@ergebnisse,\%hash);
}

$template->param(ABFRAGE => \@ergebnisse);