asp.net mvc jquery appending to a <ul class="selectlist"> on form load

Question

 foreach (OrganizationUser OrgList in GetOrganizationId)
        {
            Organization Org = new Organization();
            str.Append("<li class=selectlist-item style=display:list-item;>" + OrgList.Organization.vcr_OrganizationName);
            str.Append("<Input Type=hidden name=Organization value=" + OrgList.Organization.int_OrganizationId + ">");
            str.Append("</li>");
        }

ok what i want to do is when edit is called i want to pick up all the li(which will be generated on runtime) with class name ="selectlist-item" and append it to ul with class ="selectlist" , please don't tell me to put ul also on runtime because the plugin i am using already have ul there