[kh99]

Originally Posted by clubvr4

The template I want to call from navbar template is called memberbar_basic.

You would create a new plugin with code something like this:

$templater = vB_Template::create('memberbar_basic');
$templater->register('my_var', $my_var); // one or more of these if memberbar_basic uses variables, otherwise leave it out.
$memberbar_basic = $templater->render();
vB_Template::preRegister('navbar', array('memberbar_basic' => $memberbar_basic));

and you would put {vb:raw memberbar_basic} in the navber template. Hook location parse_templates would probably be a good place for your plugin.