Why not using some CSV specialized module for parsing? You'll avoid this way having to handle 'special' cases like another field separator instead '|' or fields that contain the same char as the field separator etc.
here is a simple example using Text::CSV_XS:

#!/usr/bin/perl -w
use strict;
use Text::CSV_XS ();
use CGI '-autoload';

my $csv = Text::CSV_XS->new({sep_char => '|','escape_char' => '\\',});
print start_html(), $/, start_table();
while(my $line = <DATA>) {
    $csv->parse($line) or next;
    print $/, start_Tr(),
          ( map { td(escapeHTML($_)) } $csv->fields() ),
          end_Tr();
}
print $/, end_table(), $/, end_html(), $/;

__DATA__
(foo\|bar)&muci++|5m28888kk|020022992
b"loat++\|<bizbaz>|115m28888kk|020022992333
bloat++"\|<bizbaz>|115m28888kk|020022992333
kk|maka\|paka|111kkio433i|kksk43992s3
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