One-stop resource on how to effectively disable SSLv3 in major web browsers as well as in web, mail and other servers that may still be using it.
Put the following line in your configuration file, or replace any existing line starting with SSLProtocol:
SSLProtocol All -SSLv2 -SSLv3
Then run: sudo apache2ctl configtest && sudo service apache2 restart.
Don't forget to test your website.