$(function() {
    var on_click_nav = function(event) {
        event.preventDefault();
        var obj = $(this);
        if(obj.is('.active')) {
            return;
        }        
        var search_text = '.dynamic-content.'+obj.text().toLowerCase();
        var target_div = $(search_text);

        if(target_div.length > 0) {
            var current_active = $('.dynamic-content.active');
            var current_active_link = $('#dynamic-navigation div a.active');

            current_active_link.removeClass('active');
            current_active.removeClass('active');
            target_div.addClass('active');
            obj.addClass('active');
        }      
    };
    $('#dynamic-navigation div a').click(on_click_nav);
});