SharePoint2013 Set Value To PeoplePicker
var columnName = 'Display Name';
var userName = 'domain\\name';
var searchText = RegExp("FieldName=\"" + columnName + "\"", "gi");
$("td .ms-formbody").each(function() {
if(searchText.test($(this).html())) {
alert(userName);
$(this).find("div[Title='xinix']").html(userName);
}
});