<html>
<head>
<script src="jquery.js"></script>
<script>
$(function(){
$("#includedContent").load("b.html");
});
</script>
</head>
<body>
<div id="includedContent"></div>
</body>
</html>
Попробуйте так:
ul li {
height: 94px;
display: inline-block;
}
add_filter('the_content','your_delete_function');
function your_delete_function($content) {
return str_replace('?<p> </p>?', '', $content);
}