List out all "Layout Tabs" in the frontend
Assuming you have an 'entry', this should work:
{% for tab in entry.getFieldLayout().getTabs() %}
    &lt;ul&gt;
        &lt;li&gt;{{ tab.name }}
            &lt;ul&gt;
                {% for field in tab.getFields() %}
                    &lt;li&gt;{{ field.name }}&lt;/li&gt;
                {% endfor %}
            &lt;/ul&gt;
        &lt;/li&gt;
    &lt;/ul&gt;
{% endfor %}

if you don't need the fields then just:
{% for tab in entry.getFieldLayout.getTabs() %}
    &lt;ul&gt;
        &lt;li&gt;{{ tab.name }}&lt;/li&gt;
    &lt;/ul&gt;
{% endfor %}