This is a demonstration of how to use Highlander Grouping and Setall trigclass to manage the expand/collapse all triggers:
[expand title="Expand All" swaptitle="Collapse All" trigclass="setall" rel="my_group-highlander"/]
[expand title="expand 1" rel="my_group-highlander"]this is the first expand item[/expand]
[expand title="expand 2" rel="my_group-highlander"]this is the second expand item[/expand]
[expand title="expand 3" rel="my_group-highlander"]this is the thrid expand item[/expand]
[expand title="expand 4" rel="my_group-highlander"]this is the thrid expand item[/expand]
Expand All
expand 1
this is the first expand item
expand 2
this is the second expand item
expand 3
this is the thrid expand item
expand 4
this is the thrid expand item