<p>Do you keep a simple blog, where you don’t define specific categories for your posts but simply let them all be uncategorized and use tags instead? Do you, like me, feel that all the categorizing stuff comes in the way of your content and your blog? Do you feel that keeping only one category seems superflous, but WordPress just forces you to? Then this plugin might be for you!</p>
<p>This plugin is mostly cosmetic, as it doesn’t change or actually remove any categories, but hides any options to change them, so all posts are in fact put in the default category (usually “Uncategorized”). This currently includes the category section on the edit pages and the “Manage categories” section on the admin pages. Published posts will not mention categories, and the Category widget has been removed.</p>
<p>As it doesn’t actually remove the categories or modify any files, <em>this plugin will not affect any other plugins’ usage of categories</em>. This means “Uncategorized” will show up on statistic pages, etc.</p>


No Categories

Simply disables the usage of categories in your WordPress blog.

migrad

<h4>Frontend</h4>
<p>This plugin allows you to display and collapse the tree of subcategories of categories that have at least one subcategory.</p>
<p>Features:</p>
<ul>
<li>Collaps and expand subcategories.</li>
<li>Remove links of all or some categories.</li>
<li>Hide one or several categories.</li>
<li>Change the images with plus and minus symbols for other images that represent collapsed or expanded categories, or css icons.</li>
<li>Order categories list by name and slug.</li>
<li>Hide icons for expand/collapse if you don’t want it.</li>
<li>Collapse all categories when show a post page or maintain expand the category related with the post.</li>
<li>Maintain expand all or some categories.</li>
</ul>
<h4>If your WordPress theme don’t use the widget categories list of WordPress, this plugin maybe don’t work.</h4>
<h4>Backend</h4>
<p>This plugin allows you can to limit the number of categories and subcategories selectables in the categories list block in edit post page.</p>
<p>Features:</p>
<ul>
<li>Limit the number of categories or subcategories selectables in the categories list block in edit post page.</li>
<li>Admin page for custom this limit for category level.</li>
</ul>


Collapsing Categories List

This plugin modifies the categories block to add new features such as collapse and expand categories and subcategories, order, etc.

No Categories vs Collapsing Categories List