I have no idea about how you build your module and what the $item stands for there.
Assuming you are loading the articles using the com_content's model and you have an array of $items with each $item being an Article Object, returned by the ContentModel, then you can do at the top of your module's template:
$dispatcher = JEventDispatcher::getInstance();
JPluginHelper::importPlugin('content');
Then in your loop of the $items (since you said you are porting over a category blog, I guess you will have a list of articles).
foreach ($items as $item) {
// Get everything from the enabled OnContentBefore plugins in an array
// passing the $item and $params as reference
$results = $dispatcher->trigger('onContentBeforeDisplay', array('com_content.article', &$item, &$item->params, 0));
$beforeDisplayContent = trim(implode("\n", $results));
echo $beforeDisplayContent . ' - ' . $item->title;
}
##More reading: JPlugin Documentation: