[рони]

ureech,

function NewCats(e){
//...
success:function(data){
var list = JSON.parse(data);
    var html = [];
    for (var i=0; i<list.length;i++) {
    html = '<option value="'+list[i].id+'">'+list[i].title+'</option>';
    };
*!*
    e.insertAdjacentHTML('beforeend', html);
*/!*
})