.div-em-colunas {
     -webkit-column-count:4; /* Chrome, Safari, Opera */
     -moz-column-count:4;    /* Firefox */
      column-count:4;         /* padrão */

<div class="div-em-colunas" >
     <div align="center" style="border-style: ridge;height:90px;"><b><?=$linha['user']?></b></br><?=$linha['name']?>
     </div>
</div>