It is possible, but you will need to use advancedXML to make that happen.
Hey, all you need to do this is at;
http://splunk-base.splunk.com/answers/11152/drilldown-link-in-dashboard
If you haven't worked in AdvancedXML yet all you need to do is go to the view you want to change to advanced XML and add -> ?showsource=1
This will then display the XML in an advanced form and you can copy it, go back to the dashboard, edit it and edit the xml and paste the advanced version in.
the link that Drainy mentioned doesnt work. This is the correct link. https://answers.splunk.com/answers/11152/drilldown-link-in-dashboard.html
It is possible, but you will need to use advancedXML to make that happen.