By default, when you create a new category in WordPress, the word category appears in the URL of the category page. For example, if you created a category called environment, the page for that category could be reached at yourwebsite.com/category/environment. If you like that URL, well and good. If you do not want the word category to be in the URL, the easiest workaround is to install a plugin.
Remove Category URL is a simple and straightforward plugin that does the task. You just install it and activate it. No configuration is needed to be done. It removes the word category from category URLs of a WordPress-powered website. After installing and activating the plugin, page for the environment category in the example above could be accessed at yourwebsite.com/environment. Please note that we do not make any form of warranty whatsoever in writing about this plugin. Download and install it at your own risk.