Jajar tengah menu WordPress

Langkah 1:

ul{
   width: 100%;
   display: table;
   text-align: center;
}

Langkah 2:

ul li{
     display: inline-block;
     float: none;
}

Selesai

Sumber: https://stackoverflow.com/questions/39360452/css-how-to-center-a-menu