[j0hnik]

<Creative mode ON>

<style>
	.phone_number{
	position: relative;
	display: block;
	text-align: right;
	top: 0;
	right: -40px;
	transition: 1s;
	}
</style>
	<span class="phone_number"><span class="phone_number_active">Показать</span>+74951182647</span><br>
	<span class="phone_number"><span class="phone_number_active">Показать</span>+74951182647</span>
	<script>
		[].forEach.call(document.querySelectorAll('.phone_number'),function(el){
			var btn = el.querySelector('.phone_number_active');
			btn.onclick = e => el.style.right = '0';
		});
</script>