This is accomplished by adding some directives on the .htaccess.
The first step is to enable the .htaccess in your directory, this needs to be enables in
/etc/apache2/apache2.conf
CHANGE
<Directory /var/www/>
Options Indexes FollowSymLinks
AllowOverride ALL
Require all granted
</Directory>
TO
<Directory /var/www/>
Options Indexes FollowSymLinks
AllowOverride ALL
Require all granted
</Directory>
where <Directory /var/www/> is the directory where you want to enable de .htaccess.
Then you can see the description of the htaccess config
http://httpd.apache.org/docs/2.2/mod/mod_autoindex.html
And a tutorial.
http://www.okayjacob.com/blog/web-talk/fancy-directory-listing-htaccess.html