JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class='projectscontainer'>
	<div class="destarrow arrow-right"></div>
	<span class="item destproject unselectable" title="ID: 426">asdasdasd-Xrj</span><br>
	<div class="srcprojects" style="display: block; margin-left: 30px;">
		<span class="item srcproject" title="ID: 4760">Lokhxtea</span>
	</div>
	<div class="srcprojects" style="display: block; margin-left: 30px;">
		<span class="item srcproject" title="ID: 4760">Zbjamjh</span>
	</div>
	<div class="srcprojects" style="display: block; margin-left: 30px;">
		<span class="item srcproject" title="ID: 6034">Jeuzax-Xrjamjhxteaq</span>
		<div id='arrow' class='arrow-right'></div>
		<span class='item srcproject exception' title='Project'>Qiospq</span>
		<div id='arrow' class='arrow-right'></div>
		<span class='item srcproject exception' title='Feature'>Qiospq</span>
		<div id='arrow' class='arrow-right'></div>
		<span class='item srcproject exception' title='Milestone'>Muqewko</span>
	</div>
</div>

<div class='projectscontainer'>
	<div class="destarrow arrow-right"></div>
	<span class="item destproject unselectable" title="ID: 426">weuzax-Xrj</span><br>
	<div class="srcprojects" style="display: block; margin-left: 30px;">
		<span class="item srcproject" title="ID: 4760">mjhxtea</span>
	</div>
	<div class="srcprojects" style="display: block; margin-left: 30px;">
		<span class="item srcproject" title="ID: 4760">Xrjamjh</span>
	</div>
	<div class="srcprojects" style="display: block; margin-left: 30px;">
		<span class="item srcproject" title="ID: 6034">Kaoweuzax-Xrjamjhxteaq</span>
		<div id='arrow' class='arrow-right'></div>
		<span class='item srcproject exception' title='Project'>Aoiospq</span>
		<div id='arrow' class='arrow-right'></div>
		<span class='item srcproject exception' title='Feature'>Klwspq</span>
		<div id='arrow' class='arrow-right'></div>
		<span class='item srcproject exception'...

CSS

body {
    font-family:"Helvetica", "Arial", "FreeSans", "Verdana", "Tahoma", "Lucida Sans", "Lucida Sans Unicode", "Luxi Sans", sans-serif;
}
div.content {
    display: block;
}
.item {
    background: #00E6E6;
    display: inline-block;
    padding: 2px 5px;
    margin: 2px 0px;
}
.srcprojects {
    margin-left: 30px;
}
.destproject {
    cursor: pointer;
}
/*.destproject::-moz-selection, .destproject::selection {
	background-color:Transparent;
	color:#000;
}
*/
 .exception {
    background-color: #FA6699;
}
.null {
    background-color: #D1D1D1;
}
#destarrow {
    cursor: pointer;
}
.unselectable {
    -webkit-user-select: none;
    /* Safari, Chrome */
    -khtml-user-select: none;
    /* Konqueror */
    -moz-user-select: none;
    /* Firefox */
    -ms-user-select: none;
    /* IE */
    user-select: none;
    /* CSS3 */
}
span.row {
    width: 300px;
    display: inline-block;
}
.arrow-left {
    width: 0;
    height: 0;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-right: 5px solid black;
}
.arrow-right {
    display: inline-block;
    width: 0;
    height: 0;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-left: 5px solid black;
    margin: 0 5px;
}
.arrow-up {
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: 5px solid black;
}
.arrow-down {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid black;
    margin: 0 4px 4px 1px;
}
.clear {
    clear: both;
    margin: 10px 0;
}

JavaScript

$('div.srcprojects').hide();

$('.projectscontainer').on("click", "span.destproject", function () {
    $(this).siblings('.srcprojects').toggle().end().siblings('div.destarrow').toggleClass("arrow-right arrow-down");
}).on("click", "div.destarrow", function () {
    $(this).parent().find("span.destproject").trigger("click");
});