$(document).ready(function() {
    
    // Show the bits we want to show
    $('.hidden').show();
    
    // Hide the bits we don't want to see
    $('div.category-listing').hide();
    $('div.category-listing').css("display", "none");
    $('div#bespoke-text').hide();

    $('select#category_filter').change(function() {
       $("select option:selected").each(function () {
           $('div#bespoke-text').hide();
           $("div.course-listing").hide();
           list = $("div."+$(this).attr('value'));
           if (list.size() > 0) { list.show(); } else { $('div#bespoke-text').show(); }
           $("div#category-content").html("<h2>" + $(this).text() + "</h2>");
        });
    });
});