user interface - Collapse all trees in jquery checkboxtree -

i use jquery checkboxtree , start tree in collapsed mode.

i use this:

$(document).ready(function(){     $('#ch_group_menu').checkboxtree(); }); 

i tree , childs collapsed @ start. how can do?

you can use

$('#ch_group_menu').checkboxtree('collapse','.expanded');

after form generated , checkboxtree applied.