title: How to replace underscore to dash with Nginx
body: <p>I'm using Nginx for the first time ever, and got basically no knowledge of it.</p>
  
  <p>I need to replace "_" with "-" in 100+ URL. I figured there must be an easy way to do this with Nginx, but can't find anything on Google.</p>
  
  <p>Thanks!</p>
  
  <p>Edit : </p>
  
  <p>My url are for example : <a href="http://www.mywebsite.com/this_category/page1.php" rel="nofollow">http://www.mywebsite.com/this_category/page1.php</a></p>
  
  <p>I need this to become : <a href="http://www.mywebsite.com/this-category/page1.php" rel="nofollow">http://www.mywebsite.com/this-category/page1.php</a></p>