Hi,
That means you want to have mainnav with logo >> mainmenu >> search. Here are the the sample code:
<?php
/**
* @package T3 Blank
* @copyright Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('_JEXEC') or die;
?>
<div class="container">
<div class="row">
<div class="span2">
<jdoc:include type="modules" name="<?php $this->_p('position-1') ?>" />
</div>
<!-- MAIN NAVIGATION -->
<div class="span8">
<nav id="t3-mainnav" class="t3-mainnav wrap navbar-collapse-fixed-top">
<div class="container navbar">
<div class="navbar-inner">
<button type="button" class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
<i class="icon-reorder"></i>
</button>
<div class="nav-collapse collapse<?php echo $this->getParam('navigation_collapse_showsub', 1) ? ' always-show' : '' ?>">
<?php if ($this->getParam('navigation_type') == 'megamenu') : ?>
<jdoc:include type="megamenu" />
<?php else : ?>
<jdoc:include type="modules" name="<?php $this->_p('mainnav') ?>" style="raw" />
<?php endif ?>
</div>
</div>
</div>
</nav>
</div>
<!-- //MAIN NAVIGATION -->
<div class="span2">
<jdoc:include type="modules" name="<?php $this->_p('head-search') ?>" />
</div>
</div>
</div>
P/S: please note that you have to customize the style. This is just the sample and a tip to help you create such structure mainnav.
Gardner.