If you set properties margin-leftand margin-righta negative value, you can deploy the content roll-page width.
The default values are margin-topalso margin-bottomfor dumped elements 8px, so we can write a CSS rule for this:
.ui-collapsible {
margin : 8px -15px;
}
-15px, padding, data-role="content" .
jsfiddle, , : http://jsfiddle.net/jasper/zSvqU/