按类别过帐过滤

Question

I used this code for post filtering by post category. Categories are listed in a ul list. I want to pass that li value to my function. In this code only the first item value is passed.

$(document).on("click", "#cats", function() {
  var selval = $("#cats").data('slug');
  $.ajax({
    url: "<?php bloginfo('template_url'); ?>/ajaxfiles/ajax-blog-cata.php",
    type: "POST",
    cache: 'false',
    data: {
      selval: selval
    },
    success: function(data) {
      console.log(data);
      $('#blog-cata').empty()
      $('#blog-cata').html(data);
    }
  });
});