system:
        eng:
            fieldtypes:
                ezxml:
                    custom_tags:
                        - { path: %kernel.root_dir%/../src/AppBundle/Resources/views/tags/facebook.xsl }
            location_view:
                full:
                    test:
                        template: AppBundle::test.html.twig
                        match:
                            Identifier\ContentType: [folder]

[CustomTagSettings]
AvailableCustomTags[]
AvailableCustomTags[]=facebook

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet
        version="1.0"
        xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
        xmlns:php="http://php.net/xsl"
        xmlns:xhtml="http://ez.no/namespaces/ezpublish3/xhtml/"
        xmlns:custom="http://ez.no/namespaces/ezpublish3/custom/"
        xmlns:image="http://ez.no/namespaces/ezpublish3/image/"
        exclude-result-prefixes="xhtml custom image php">

    <xsl:output method="html" indent="yes" encoding="UTF-8"/>

    <xsl:template match="custom[@name='facebook']">
        <two-click>
            <xsl:attribute name="data-component">
                <xsl:text>two-click</xsl:text>
            </xsl:attribute>
            <xsl:attribute name="data-id">
                <xsl:value-of select="@custom:src"/>
            </xsl:attribute>
            <xsl:attribute name="data-type">
                <xsl:text>facebook</xsl:text>
            </xsl:attribute>
            <xsl:attribute name="class">
                <xsl:text>custom-tag-facebook</xsl:text>
            </xsl:attribute>
            <h4>
                Active Facebook Content
            </h4>
            <span>
                Here is some Text...
            </span>
            <button>Click me</button>
        </two-click>
    </xsl:template>
</xsl:stylesheet>

{% block content %}
    {{ ez_field_value(content, 'description').xml | xmltext_to_html5  }}
{% endblock %}

<p><two-click data-component="two-click" data-id="" data-type="facebook" class="custom-tag-facebook">
<h4>
      Active Facebook Content
</h4>
<span>
 Here is some Text...
</span>
<button>Click me</button>
</two-click></p>