With Content Views, you can show posts in collapsible list, like this sample.
By default, opened item will be closed on click any another item. To change that behavior (keep opened item remain opening), please use this custom script:
/* Collapsible List - prevent hiding other opened items on click an item */ window.cv_collapse_ignore_others = 1;
If you are using Content Views Free, please add above code with this instruction (click here).