how to add Tags to Struct by function in golang

type Items []Item

type Item struct {
    Id        string `json:"id"        required:"true"`
    CompCd    string `json:"compCd"    required:"true"`
    OrgCd     string `json:"orgCd"`
    QstnId    string `json:"qstnId"    required:"true"`
    QstnIdSeq string `json:"qstnIdSeq" required:"true"`
    CustId    string `json:"custId"`
    AnsDts    string `json:"ansDts"    required:"true"`
    AnsRout   string `json:"ansRout"   required:"true"`
    QCd01     string `json:"qCd01"`
    QKey01    string `json:"qKey01"`
    QStc01    string `json:"qStc01"`
    QCat01    string `json:"qCat01"`
    Pont01    string `json:"pont01"`
    PCat01    string `json:"pCat01"`
    Comt01    string `json:"comt01"`
    QCd02     string `json:"qCd02"`
    QKey02    string `json:"qKey02"`
    QStc02    string `json:"qStc02"`
    QCat02    string `json:"qCat02"`
    Pont02    string `json:"pont02"`
    PCat02    string `json:"pCat02"`
    Comt02    string `json:"comt02"`
    .
    .
    .
    QCd50  string `json:"qCd50"`
    QKey50 string `json:"qKey50"`
    QStc50 string `json:"qStc50"`
    QCat50 string `json:"qCat50"`
    Pont50 string `json:"pont50"`
    PCat50 string `json:"pCat50"`
    Comt50 string `json:"comt50"`
}

I have the struct like above. My problem: i want to compact tags in struct by function with loop for i = 1 -> 50 like: func addTags{for i:=1;i<=50;i++{//add Tags to struct}}, but i do not know how to do it. I'm newbie. I started learning golang a few day before. I'm not good at English sorry!