use strict;

# Read from standard input
while (<>) {
    s/;/\n/g; # this is just like sed
    s/:/\n/g; # this is just like sed

    # Now, split the input line on newlines, like awk will do:
    my @pages = split /\n/;

    for my $page (@pages) {
        # I'm using qq{...} instead of double quotes (")
        # so I don't have to escape the stuff in ugly ways
        print qq{<a href="http://mysite.net/$page">$page</a>\n};
    };
};