OOOPS!
Sorry, wrong dropdown list.
You want the one in the POSTBIT.
If you are using the vB3 style postbit (at the top) then go into your POSTBIT template and find
Code:
<!-- post $post[postid] popup menu -->
<div class="vbmenu_popup" id="postmenu_$post[postid]_menu" style="display:none">
<table cellpadding="4" cellspacing="1" border="0">
<tr>
<td class="thead">$post[username]</td>
</tr>
<if condition="$show['profile']">
<tr><td class="vbmenu_option"><a href="member.php?$session[sessionurl]userid=$post[userid]">$vbphrase[view_public_profile]</a></td></tr>
</if>
and add it below that.
If you are using the legacy postbit (to the left) go into your POSTBIT_LEGACY template and find the same code to add your item below.
I'm very sorry about that but you will need to remove the entry you have made from your navbar template.