WordPress categories are helpful in listing the posts and are useful to some extent in terms of SEO. Every WordPress category will have an unique name and slug URL, here are some categories from WPSquare for your reference:
WordPress Themes – http://www.wpsquare.com/category/themes
WordPress Plugins – http://www.wpsquare.com/category/plugins
WordPress Snippets – http://www.wpsquare.com/category/snippets

Now, coming to our topic, all the categories in your blog can be listed using the default Category list plugin in WordPress. But, coming to displaying those categories in two columns (mainly to save some real-estate on your blog homepage) there are no widgets or plugins. Simply use this code snippet and also follow instructions on How to Execute php in WordPress Text Widget without a Plugin, so that you can list categories in two columns using a text widget.
Display WordPress Categories in two Columns
You can add this code to sidebar widget or can add to any hook of your theme (if you are using Thesis or Genesis framework).
<?php
$cats = explode("<br />",wp_list_categories('title_li=&echo=0&depth=1&style=none'));
$cat_n = count($cats) - 1;
for ($i=0;$i<$cat_n;$i++):
if ($i<$cat_n/2):
$cat_left = $cat_left.'<li>'.$cats[$i].'</li>';
elseif ($i>=$cat_n/2):
$cat_right = $cat_right.'<li>'.$cats[$i].'</li>';
endif;
endfor;
?>
<div id="categories">
<ul>
<?php echo $cat_left;?>
</ul>
<ul>
<?php echo $cat_right;?>
</ul>
</div>
Functionality of the code:
- This code mainly depends on
wp_list_categoriesfunction. - It will check for all categories in your blog and simply list them in two columns.
Also Check: How to Display Random Posts in WordPress without a Plugin
Style WordPress Categories in two Columns
You need to edit these theme files…
style.cssHence, it is recommended to backup your theme.
Now, its time to add some styling to the category list, hence add below code to style.css file and click on update button.
#categories .left {
float: left;
width: 49%;
margin:0 5px 0 0;
}
#categories .right {
float: left;
width: 49%;
}
You have successfully added WordPress Categories in two columns, if you got any query regarding this article please do drop a comment.


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How to show only selected categories in two columns please tell.
This code displays all categories and if you want to display selected categories in two columns, then the only possible solution is to add them manually.
I discovered this plugin : http://wordpress.org/extend/plugins/multi-column-tag-map/installation/
It creates columns for categories very easily. Have a try
columns, then the only possible solution is to add them manually.