If the space between the arrows does not need to be transparent (it is solid color) you can use the :before
and :after
to create the edges (without new elements in DOM)
Basically, it creates rotated squares with the borders we want and places them accordingly
#flowBoxes {
margin:auto;
padding:20px;
min-width:700px;
}
#flowBoxes div {
display:inline-block;
position:relative;
height:25px;
line-height:25px;
padding:0 20px;
border:1px solid #ccc;
margin-right:2px;
background-color:white;
}
#flowBoxes div.right:after{
content:'';
border-top:1px solid #ccc;
border-right:1px solid #ccc;
width:18px;
height:18px;
position:absolute;
right:0;
top:-1px;
background-color:white;
z-index:150;
-webkit-transform: translate(10px,4px) rotate(45deg);
-moz-transform: translate(10px,4px) rotate(45deg);
-ms-transform: translate(10px,4px) rotate(45deg);
-o-transform: translate(10px,4px) rotate(20deg);
transform: translate(10px,4px) rotate(45deg);
}
#flowBoxes div.left:before{
content:'';
border-top:1px solid #ccc;
border-right:1px solid #ccc;
width:18px;
height:18px;
position:absolute;
left:0;
top:-1px;
background-color:white;
z-index:50;
-webkit-transform: translate(-10px,4px) rotate(45deg);
-moz-transform: translate(-10px,4px) rotate(45deg);
-ms-transform: translate(-10px,4px) rotate(45deg);
-o-transform: translate(-10px,4px) rotate(20deg);
transform: translate(-10px,4px) rotate(45deg);
}
#flowBoxes .active{
background-color:green;
color:white;
}
#flowBoxes div.active:after{
background-color:green;
}
<div id="flowBoxes">
<div class="right">Diersoort / I&R</div>
<div class="left right active">Model</div>
<div class="left right">Varianten</div>
<div class="left right">Bedrukkingen</div>
<div class="left">Bevestiging</div>
</div>