I can see this source code in your page:
<div id="cat-1" class="category">
<span class="cat_title"><a href="http://thepocketpark.com/blog/?cat=5"></a></span>
<a href="http://thepocketpark.com/blog/?cat=5"></a>
</div>
<div id="cat-2" class="category">
<span class="cat_title"><a href="http://thepocketpark.com/blog/?cat=6"></a></span>
<a href="http://thepocketpark.com/blog/?cat=6"></a>
</div>
<div id="cat-3" class="category">
<span class="cat_title"><a href="http://thepocketpark.com/blog/?cat=7"></a></span>
<a href="http://thepocketpark.com/blog/?cat=7"></a>
</div>
<div id="cat-4" class="category">
<span class="cat_title"><a href="http://thepocketpark.com/blog/?cat=8">Screen Print</a></span>
<a href="http://thepocketpark.com/blog/?cat=8"><p>Showing the process of screen printing has always fascinated me. Perhaps you too?</p>
</a>
</div>
<div id="cat-5" class="category">
<span class="cat_title"><a href="http://thepocketpark.com/blog/?cat=11">Random Stuff</a></span>
<a href="http://thepocketpark.com/blog/?cat=11"><p>You get the title. Random stuff goes here. </p>
</a>
</div>
That means that you’re listing rightly your categories but for some reason the links doesn’t have text.
Please check if your categories has a name and a description in the WP Admin.
