Add the following to your SSL configuration section:

   # Disable SSLv2 & SSLv3 against POODLE issue (CVE-2014-3566)
    SSLProtocol All -SSLv2 -SSLv3

Note to insert this to all VirtualHost sections where SSL is enabled!

Check your config:

apachectl configtest

Then restart apache server:

sudo service apache2 restart

To check if SSLv3 is turned off:

openssl s_client -connect server.domain.tld:443 -ssl3

Then you shold see a message like this:

error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure:s3_pkt.c:1260:SSL alert number 40

To disable SSLv3 within other services:
see this post