// promotion
jQuery('#filter_promotion select').on('change',function(){    
    var seviceTag  = jQuery("select[name='select_service']").val();
    callAjaxForPromotion(seviceTag);
});
function callAjaxForPromotion(seviceTag) {
    jQuery.ajax({
        url: ajaxStuff.ajaxurl,
        type: "POST",
        data: {
            action: 'filter_promotionCategory',
            seviceTag : seviceTag,
        },
        success: function (data) {
            jQuery('.category-promotiofilter').html(data);
        },
        error: function (data) {

            alert('error');

        }
    });

}
// testimonial
jQuery('#filter_testimonial select').on('change',function(){    
    var seviceTag  = jQuery("select[name='select_service']").val();
    callAjaxForTestimonial(seviceTag);
});

function callAjaxForTestimonial(seviceTag) {
    jQuery.ajax({
        url: ajaxStuff.ajaxurl,
        type: "POST",
        data: {
            action: 'filter_testimonialCategory',
            seviceTag : seviceTag,
        },
        success: function (data) {
            jQuery('.category-testimonialfilter').html(data);
        },
        error: function (data) {

            alert('error');

        }
    });

}