group_advanced_settings.html

<cms:capture into='my_advanced_settings' >
    <cms:admin_form_fields childof='_advanced_settings_' depth='1'>
        <cms:render 'form_row' />
    </cms:admin_form_fields>
</cms:capture>

<cms:if "<cms:not_empty my_advanced_settings />">
    <cms:php>global $CTX; $CTX->set('k_show_advanced_settings', '1', 'global');</cms:php>

    <div id="settings-panel">
        <button class="btn btn-primary btn-flat icon-collapse tt-collapse" id="settings-panel-toggle" title="<cms:localize 'advanced_settings' />" type="button"><cms:show_icon 'cog' /><span class="collapse-title"><cms:localize 'advanced_settings' /></span></button>
        
        <div class="panel-body fade-short" style="display:none;">
            <cms:show my_advanced_settings />
        </div>
    </div>

    <cms:admin_add_js>
        $( function() {
            var speed = 250;

            $( "#settings-panel-toggle" ).on( "click", function() {
                var $this = $( this ).blur();

                ( $this.hasClass( "expanded" ) ? COUCH.slideFadeHide : COUCH.slideFadeShow )( $this.toggleClass( "expanded" ).next(), speed );
            });
        });
    </cms:admin_add_js>
</cms:if>