Adding Things To The Top Vertical Menu

One way to add a hyperlink to the top menu is to hard code it in the "catalog/view/theme/_<current theme name>_/template/common/header.tpl" file. Look for the comment in the following html code (near the bottom).

<?php if ($categories) { ?>
<div id="menu">
<ul>
<?php foreach ($categories as $category) { ?>
<li><a href="<?php echo $category['href']; ?>"><?php echo $category['name']; ?></a>
<?php if ($category['children']) { ?>
<div>
<?php for ($i = 0; $i < count($category['children']);) { ?>
<ul>
<?php $j = $i + ceil(count($category['children']) / $category['column']); ?>
<?php for (; $i < $j; $i++) { ?>
<?php if (isset($category['children'][$i])) { ?>
<li><a href="<?php echo $category['children'][$i]['href']; ?>"><?php echo $category['children'][$i]['name']; ?></a></li>
<?php } ?>
<?php } ?>
</ul>
<?php } ?>
</div>
<?php } ?>
</li>
<?php } ?>
<!-- Adds custom button/link to the top menu -->
<li><a href="<url here>t">Title Here</a></li>
<!-- End of custom addition -->
</ul>
</div>

Another way is to download a free vQmod which allows you to add information pages to the menu. This can be done from the admin section of OpenCart (so no coding needed!).