First off, there is no such thing as a collapsible jQuery Mobile listview. Without seeing an example (which is pretty key to getting a meaningful answer here) t's unclear to me what you are talking about.
You can place a listview inside a collapsible or a several listviews inside a collapsible set, as documented here:
http://jquerymobile.com/demos/1.2.0/docs/lists/lists-collapsible.htmlIs that what you are doing?
But anyway...
You want a header for the list. That is exactly what a list divider is meant for. You don't like the look? Then change it with CSS. The JQM authors couldn't have possibly anticipated exactly what your client would want on your particular project. That is stretching quantum physics beyond believability! ;)
Why are you including an
<a> tag on an item that is meant to be a heading? (Again, I am guessing a bit here, because you have only given us a vague description without an example).
Do you want the item to act like a button, changing color when they tap it? If not, then don't include the
<a> tag! You are free to omit the
<a> tag on any item, and it will look just like a regular list item that doesn't have a link.
Now, viola! No button action (which presumably you do not want). AND no disclosure arrow (this is what I assume you mean by "icon", but again, you make us guess), because disclosure arrows only appear on items that have
<a> tags.
If you include the
<a> tag, then it will both have a raised "button" look (by default, at least) and will react to touch like a button (highlighting on hover).
If you DO want it to act like a button, that's confusing and irrational. However, clients often want things that are confusing and irrational, understood. But don't expect JQM to easily accommodate confusing and irrational use cases.
Again, you will protest, (and I know you will...) that it doesn't look as you wish. And I will again invoke quantum physics. Alas, once again, your irrational client's desires and JQM's design are not entangled.
So, you will have to use some CSS to make it look as you wish. Fortunately, items that don't have an
<a> tag are are lot simpler both structurally and in the backing CSS, and are quite easy to format any way you'd like.