JSFiddle - React, Tailwind, and code Playground

HTML

<div id="menu-outer">
        <div class="table">
            <ul id="horizontal-list">
                <li><a href="#"><img src="image.png" onmousedown="return false;" alt="Something" /></a></li>
                <li><a href="#"><img src="image.png" onmousedown="return false;" alt="Something" /></a></li>
                <li><a href="#"><img src="image.png" onmousedown="return false;" alt="Something" /></a></li>
                <li><a href="#"><img src="image.png" onmousedown="return false;" alt="Something" /></a></li>
                <li><a href="#"><img src="image.png" onmousedown="return false;" alt="Something" /></a></li>
            </ul>
        </div>
    </div>

CSS

a {
    float: left;
    width: 8em;
    text-decoration: none;
    color: white;
    background-color: #0094ff;
    padding: 0.2em 0.4em;
    border-right: 1px solid white;
    margin-left:0 auto;
    margin-right:0 auto;
}

a:hover {
    background-color: #00ff90;
}

li {
    display: inline;
}


 div {
    
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

 #horizontal-list ul {
     list-style:none;
     width:10%;
     padding-right:20px;
}

 #horizontal-list ul li {
    list-style:none;
    margin:0 auto;
    display:inline-block;
 }

.table{
    margin: auto;
    width: 50%
}