Semantic UI Accordion not working properly
Your jQuery.js module must be loaded before the semantic-ui accordion.js module.
Simply put
<script src="js/accordion.js"></script>
after
<script src="js/vendor/jquery-1.11.2.min.js"><\/script>
( or whatever your jQuery version is ... )
and initialize the accordion in the html document inside a script tag as :
<script language='javascript'>
$(document).ready(function(){
$('.ui.accordion').accordion();
});
</script>