You might want to target the class .caption-content
instead:
$('a.toggle').bind('tapone',function(e){
if($(this).hasClass('active')){
$(this).removeClass('active');
$('.caption-content').slideUp({duration: 300, easing: "easeOutQuad"});
} else {
$(this).addClass('active');
$('.caption-content').slideDown({duration: 300, easing: "easeOutQuad"});
}
});