This is bdthemes shortcodes ultimate (joomla) Accordion example. Accordion look like a spoiler style. you can use this shortcode article and custom module. just use this shortcode and get easily amaging accordion style.
Note: for your help we give a example bellow.

[accordion]
	[spoiler title="Spoiler Title"]content[/spoiler]
	[spoiler title="Spoiler Title"]content[/spoiler]
	[spoiler title="Spoiler Title"]content[/spoiler]
[/accordion]

Template style

[accordion]
	[spoiler title="Spoiler Title" class="template-style"]content[/spoiler]
	[spoiler title="Spoiler Title" class="template-style"]content[/spoiler]
	[spoiler title="Spoiler Title" class="template-style"]content[/spoiler]
[/accordion]