JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
    <h1>CSS Ribbon</h1>
    <div class="ribbon">
        <a href="#"><span>Home</span></a>
        <a href="#"><span>About</span></a>
        <a href="#"><span>Services</span></a>
        <a href="#"><span>Contact</span></a>
    </div>
</div>

CSS

body {
    background-color: #808080;
    font-family: "Lucida Grande", "Lucida Sans Unicode", "Lucida Sans", "DejaVu Sans", Verdana, sans-serif;	
}

.wrapper {
    width: 445px;
    margin: auto;	
}

.wrapper h1 {
    color: #fff;	
}

.ribbon:after, .ribbon:before {
    margin-top:0.5em;
    content: "";
    float:left;
    border:1.5em solid #F98889;
}

.ribbon:after {
    border-right-color:transparent;
}

.ribbon:before {
    border-left-color:transparent;
}

.ribbon a:link, .ribbon a:visited { 
    color:#fff;
    text-decoration:none;
    float:left;
    height:3.5em;
    overflow:hidden;
}

.ribbon span {
    background:#F98889;
    display:inline-block;
    line-height:3em;
    padding:0 1em;
    margin-top:0.5em;
    position:relative;
    
    -webkit-transition: background-color 0.2s, margin-top 0.2s;  /* Saf3.2+, Chrome */
    -moz-transition: background-color 0.2s, margin-top 0.2s;  /* FF4+ */
    -ms-transition: background-color 0.2s, margin-top 0.2s;  /* IE10 */
    -o-transition: background-color 0.2s, margin-top 0.2s;  /* Opera 10.5+ */
    transition: background-color 0.2s, margin-top 0.2s;
}

.ribbon a:hover span {
    background:#FFD204;
    margin-top:0;
}

.ribbon span:before {
    content: "";
    position:absolute;
    top:3em;
    left:0;
    border-right:0.5em solid #9B8651;
    border-bottom:0.5em solid #F98889;
}

.ribbon span:after {
    content: "";
    position:absolute;
    top:3em;
    right:0;
    border-left:0.5em solid #9B8651;
    border-bottom:0.5em solid #F98889;
}