1) Ensure apache is enabled
2) Edit /etc/apache2/users/<yourusername>.conf
  NameVirtualHost *:80
  <VirtualHost *:80>
    ServerName something.localhost
    DocumentRoot /where/your/shit/is
  </VirtualHost>
3) Add this to /etc/hosts
  127.0.0.1 something.localhost
4) sudo apachectl restart