Without knowing the specifics of what you are doing I would say use a button widget inside a list. Something like this:
<$list filter=<<somefilter>>> <$button class='tc-btn-invisible'>__<$view field='title'/>__ <$action-setfield $tiddler='$:/state/Special Tabs Select State' $field=selected_tab $value=<<currentTiddler>>/> </$button><br> </$list> where you replace <<somefilter>> with the filter to generate your list. It will make a list of the tiddler titles with each title underlined and when you click on the title it changes the other tab. If you know any css than you can probably style the buttons better than just underlined. And to save you a bit of digging, the widgets that are generally used to change tiddler fields are: checkbox radio button (with either action-setfield or the tiddler messages) action-setfield select edit-text -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/b87793fc-f819-44b8-ab13-fb3f6ce25cf5%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

