I have it in a couple of places:

set text_view_tags = "classifications";
set text_sidebox_tags_title = "classifications";

But for the top menu, I just hardcoded it:

function Page::lay_print_header_links() {
# Menu start
"""<DIV class="header-menu"><ul>""";

# Journal Navigation (Previous page, Next Page)
var string prev_link = $this->lay_get_previous_url();
var string prev_title = $this->lay_get_previous_title();
var string next_link = $this->lay_get_next_url();
var string next_title = $this->lay_get_next_title();
print ($prev_link==""?"":"<li><a href=\"$prev_link\">$prev_title</a></li>");
print ($next_link==""?"":"<li><a href=\"$next_link\">$next_title</a></li>");

# Standard Journal Pages (Recent, Archive, Friends, Userinfo)
"""<li><a href="http://rosefox.dreamwidth.org/">fresh cuttings</a></li><li><a href="http://rosefox.dreamwidth.org/calendar">growing cycle</a></li><li><a href="http://rosefox.dreamwidth.org/read">other gardeners</a></li><li><a href="http://rosefox.dreamwidth.org/tag">classifications</a></li><li><a href="http://www.dreamwidth.org/tools/memories.bml?user=rosefox">pressed flowers</a></li><li><a href="http://rosefox.dreamwidth.org/profile">genus</a></li><li><a href="http://rosejasperfox.com">RoseJasperFox.com</a></li>""";

Sorry for like a zillion comments. Apparently once one turns "don't autoformat" on one cannot turn it off again. *files a bug report*