Конкретно в примере работает плагин:
flexslider.woothemes.comРазметка:<div class="flexslider">
<ul class="slides">
<li id="slide1" class="post-43 slide type-slide status-publish hentry" style="background-image: url(http://demos.themetrust.com/baylie/wp-content/uploads/sites/16/2013/09/slide_grass.jpg);background-repeat: no-repeat;background-position: center center;background-size: cover;">
<div class="details">
<div class="box">
<div class="inside">
<div class="text">
<p><img src="http://demos.themetrust.com/baylie/wp-content/uploads/sites/16/2013/09/slide_1_graphic.png" alt="slide_1_graphic" width="351" height="331" class="alignnone size-full wp-image-44" srcset="http://demos.themetrust.com/baylie/wp-content/uploads/sites/16/2013/09/slide_1_graphic.png 351w, http://demos.themetrust.com/baylie/wp-content/uploads/sites/16/2013/09/slide_1_graphic-300x283.png 300w" sizes="(max-width: 351px) 100vw, 351px" /></p>
<a href="http://themetrust.com/baylie" target="_parent" style="background-color:#a06546;" class="button ">Buy This Theme</a>
</div>
</div>
</div>
</div>
</li>
<li id="slide2" class="post-128 slide type-slide status-publish hentry" style="background-image: url(http://demos.themetrust.com/baylie/wp-content/uploads/sites/16/2013/09/slide_mountains.jpg);background-repeat: no-repeat;background-position: center center;background-size: cover;">
<div class="details">
<div class="box">
<div class="inside">
<div class="text">
<h1>A Full Screen Slideshow</h1>
<p>Make a bold statement with big images.</p>
<a href="http://themetrust.com/demos/baylie/portfolio/" target="_parent" style="background-color:#cc6f41;" class="button ">View Portfolio</a>
</div>
</div>
</div>
</div>
</li>
</ul>
</div>
Вызов:$('.flexslider').flexslider({
slideshowSpeed: 6000,
directionNav: true,
slideshow: 1, // включаем автоматическую прокрутку
animation: 'fade', // эффект перелистывания - fade
animationLoop: true
});