You need to dynamically add active class to menu item and add suitable style to it. HTML
<ul id="navi">
<li><a class="menu" href="#">About MHG</a></li>
<li><a class="menu" href="#">Workout Programs</a></li>
<li><a class="menu" href="#">Fitness Tips</a></li>
<li><a class="menu" href="#">Contact Us</a></li>
<li><a class="menu" href="#">Read Our Blog</a></li>
</ul>
jquery
$('a.menu').click(function(){
$('a.menu').removeClass("active");
$(this).addClass("active");
});
JSFIDDLE
Reference - Jquery Add active class to main menu