Hi universityofmauritius
I checked the header block of template on your site and you load the mainnav there.
You can open the file: /templates/ja_healthcare/tpls/blocks/header.php
and remove this snippet of code:
<nav id="t3-mainnav" class="wrap navbar navbar-default t3-mainnav">
<div class="container">
<?php if ($this->getParam('navigation_collapse_enable', 1) && $this->getParam('responsive', 1)) : ?>
<?php $this->addScript(T3_URL.'/js/nav-collapse.js'); ?>
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".t3-navbar-collapse">
<i class="fa fa-bars"></i>
</button>
<?php endif ?>
<?php if ($this->getParam('addon_offcanvas_enable')) : ?>
<?php $this->loadBlock ('off-canvas') ?>
<?php endif ?>
<div class="row">
<div class="col-sm-12 <?php echo $navSize ?>">
<!-- Brand and toggle get grouped for better mobile display -->
<?php if ($this->getParam('navigation_collapse_enable')) : ?>
<div class="t3-navbar-collapse navbar-collapse collapse"></div>
<?php endif ?>
<div class="t3-navbar navbar-collapse collapse">
<jdoc:include type="<?php echo $this->getParam('navigation_type', 'megamenu') ?>" name="<?php echo $this->getParam('mm_type', 'mainmenu') ?>" />
</div>
</div>
<?php if ($navRight): ?>
<?php if ($this->countModules('nav-search')) : ?>
<!-- NAV SEARCH -->
<div class="nav-search col-md-3 text-right <?php $this->_c('nav-search') ?>">
<jdoc:include type="modules" name="<?php $this->_p('nav-search') ?>" style="raw" />
</div>
<!-- //NAV SEARCH -->
<?php endif ?>
<?php endif ?>
</div>
</div>
</nav>