Click the <> Source Code on the panels above to edit the panel-titles and panel-collapse content areas (called div's). To add more panels, copy the <div> sections that include the entire panel as the example below shows.
<div class="panel panel-primary">
<div class="panel-heading">
<h4 class="panel-title">
<a data-parent="#accordion2" data-toggle="collapse" href="#collapse1b"> Dos </a>
</h4>
</div>
<div class="panel-collapse collapse in" id="collapse1b">
<div class="panel-body">
Lorem ipsum dolor sit amet.
</div>
</div>
</div>
Keep in mind that each panel follows a sequence, and you must manually change the value of the href and id to the next number/letter, otherwise the same title-and-content pair will simply repeat.
Thus, the next href-id pair in the sequence would be:
"collapse1c"
In order for Title tags (what is inside the link <a> tags on each title) to open the proper content areas (panel-collapse), the href and id must match
<h4 class="panel-title">...will match the id value inside the panel-collapse div:
<a data-parent="#accordion3" data-toggle="collapse" href="#collapse1c"> Tres</a>
</h4>
<div class="panel-collapse collapse in" id="collapse1c">