Theme Horse

Hi there,

Your content value path may not be correct. Please use below custom css code

a[target="_blank"]:after {
	content: url(you-image-link-here);
	margin: 0 3px 0 5px;
	display: inline-block;
	opacity: 1;
	-moz-opacity: 1;
	filter:alpha(opacity=100);
}

Add your image url in above text you-image-link-here.
Let us know if you have any problem.

Thank you!