如果要从 url 中删除 /category/，请按照以下两个步骤操作:

If you want to remove /category/ from the url, follow these two steps:

1. 转到设置>>固定链接并选择自定义并输入:/%category%/%postname%/
2. 接下来将您的类别基础设置为 .

保存它，您会看到您的 URL 更改为以下格式:http://yourblog.com/quotes/

Save it and you’ll see your URL changed to this format: http://yourblog.com/quotes/

(来源:http://premium.wpmudev.org/blog/daily-tip-quick-trick-to-remove-category-from-wordpress-url/)