Hello,
You can do the above thing, using AJAX call.
$('#sidebar-left').unbind('click').click(function(e){
e.preventDefault();
e.stopPropagation();
var url = 'app/php-page';
$.post(url,
function(data) {
if ('' !== data) {
$('.test').empty().html(data);
}
}
);
});
Hope this will help you. :)