Accordion display for views inside panel
You can do it by using these modules :

Panels Accordion


  Panels Accordion provides an accordion display within Panels. By using
  accordions you can fit more content into smaller areas and allow your
  users to expand each section as needed. This uses the existing jQuery
  file for the accordion effect. The layout settings allow you to choose
  the action, effect, and speed for accordions.


views Accordion


  Views Accordion provides a display style plugin for the Views module.
  It will take the results and display them as a JQuery accordion, using
  the first field as the header for the accordion rows.