To navigate from feature files to step definitions easily .. you can use this Natural plug in.
You can download this file from here
https://github.com/rlogiacco/Natural/wiki/Installation-Guide
Download Natural.zip file manually to your local machine
Open Eclipse
Help-> Install New software
On available software click on Add button
Click on Archive button choose Nature.zip file and install .
Restart Eclipse
If you are not sure how to archive file you can get help here
http://help.eclipse.org/indigo/index.jsp?topic=/org.eclipse.platform.doc.user/tasks/tasks-127.htm
Now it will works.