<div id="secondaryActivitiesTree" class="jstree-classic">
<ul>
<li><a id="07200" href="http://example.com/a/crude-oil-petroleum-production/07200/">Crude oil (petroleum) production</a></li>
<li><a id="07440" href="http://example.com/a/gas-production/07440/">Gas production</a></li>
<li><a id="07480" href="http://example.com/a/pipeline-administration/07480/">Pipeline administration</a>
<ul>
<li><a id="07200" href="http://example.com/a/crude-oil-petroleum-production/07200/">Crude oil (petroleum) production</a></li>
<li><a id="07440" href="http://example.com/a/gas-production/07440/">Gas production</a></li>
<li><a id="07480" href="http://example.com/a/pipeline-administration/07480/">Pipeline administration</a>
</div>