JSFiddle - React, Tailwind, and code Playground

HTML

<div class="sitemap">
    <div class="row-fluid">
            <ul>    
               <li class="menulinks">
                 <div class="menulinks-header"></div>
                 <ul>
                     <li class="submenulinks"><div>Test 1</div></li>
                     <li class="submenulinks"><div>Test 2</div></li>
                     <li class="submenulinks"><div>Test 3</div></li>
                     <li class="submenulinks"><div>Test 4</div></li>
                     <li class="submenulinks"><div>Test 5</div></li>
                     <li class="submenulinks"><div>Test 6</div></li>
                     <li class="submenulinks"><div>Test 7</div></li>
                     <li class="submenulinks"><div>Test 8</div></li>
                     <li class="submenulinks"><div>Test 9</div></li>
                 </ul>
               </li>
                <li class="menulinks">
                    <div class="menulinks-header"></div>
                 <ul>
                     <li class="submenulinks"><div>Test 1</div></li>
                     <li class="submenulinks"><div>Test 2</div></li>
                     <li class="submenulinks"><div>Test 3</div></li>
                     <li class="submenulinks"><div>Test 4</div></li>
                     <li class="submenulinks"><div>Test 5</div></li>
                     <li class="submenulinks"><div>Test 6</div></li>
                     <li class="submenulinks"><div>Test 7</div></li>
                     <li class="submenulinks"><div>Test 8</div></li>
                     <li class="submenulinks"><div>Test 9</div></li>
                 </ul>
               </li>
                <li class="menulinks">
                    <div class="menulinks-header"></div>
                 <ul>
                     <li class="submenulinks"><div>Test 1</div></li>
                     <li class="submenulinks"><div>Test 2</div></li>
                     <li class="submenulinks"><div>Test 3</div></li>
                     <li...

CSS

.sitemap .menulinks{

    margin-top: 20px;
    text-align:center;
    padding-top:10px;
    margin-left: 0px;
    margin-right:10px;
    color: #FFFFFF;
    width:11%;
    float:left;
    min-width: 100px;
    display:block;
}

.sitemap .menulinks-header {
    height:35px;
    background-color:green;
    border-radius: 10px;
}

.submenulinks{
    margin-top: 20px;
    margin-right:10px;
    color: green;
}