使用kendo ui按值更改/修改下拉列表文本

I'm working with Teleriks Kendo UI in hope it makes my life easier (not proved yet). Currently I implemented a kendoui dropdownlist (#gamelist) filled up by a JSON php script. That works so fine so far…. I would like now to change (not set) a text of an option inside this dropdownlist (I know the value from outside the dropdownlist). I couldn't find anything about changing values and/or text of an option entry at Teleriks example page: I'm working with Teleriks Kendo UI in hope it m