I think these are both part of the core code. You will need to write a global to rewrite the returned code unless you are willing to edit the files.
$category_results .= "<li>$title\n"; is in Search.pm
and
push @output, qq~<li><a href="$CFG->{build_new_url}/$date$CFG->{build_extension}">$long_date</a> ($count)~;
is in Build.pm
$category_results .= "<li>$title\n"; is in Search.pm
and
push @output, qq~<li><a href="$CFG->{build_new_url}/$date$CFG->{build_extension}">$long_date</a> ($count)~;
is in Build.pm