Example copy-and paste this HTML code in any post or page to hide and show some text, images or url 
<div class="itm_simple_slidetoggle"> Click here to toggle next  DIV </div>
<div class="itm_simple_hidden">Here you may place any HTML text, Url, Video Iframe or Images to hide.</div>	

<div class="contingut_complert">
    <div ><strong>Title</strong> or previous text </div> 
    <div class="itm_simple_hide">[ - ]</div>
    <div class="itm_simple_show">[ + ]</div> This content shows at the right side of [ + ] 
    <div class="itm_simple_hidden">Here you may place any HTML text, Url, Video Iframe or Images to hide.</div>	
</div>

<div class="contingut_complert">
    <div><strong>Instalación en Windows</strong></div>
    <div class="itm_simple_hide">[ - ]</div>
    <div class="itm_simple_show">[ + ]</div> Abre la ayuda Windows
    <div class="itm_simple_hidden ">Todos los <strong>Windows XP, Vista, Windows 7 ,Windows 8</strong> y <strong>Windows 10</strong> deben funcionar. Si tienes alguna dificultad con la instalación consúltanos. A) primero debe descargarse el fichero <strong>sapgui.zip</strong> en cualquier directorio. <a href="https://drive.google.com/open?id=0BzmSfmfy2XumV2pSMC1KWTJMenc" target="_blank" rel="noopener noreferrer">Descarga sapgui.zip</a>  Usa la flecha de descarga B) Selecciona todos los ficheros desde el programa de descomprimir.C) Extrae todos los ficheros a un directorio. D) Instala ejecutando sapguisetup.exe . (El usuario debe tener permiso para instalar programas en el sistema operativo.)</div>
</div>
    
This is a kind of FAQ like page. Each of the three lines Toggle the following <div>. Toggle is Hide/Show
Place any HTML content!     
<div class="itm_simple_container">
    <div class="itm_simple_sldtggl">Click here to toggle next DIV: 1</div>
    <div class="itm_simple_hddn">Here you may place any HTML text, Url , Video Iframe or images to hide.</div>
</div>
<div class="itm_simple_container">
    <div class="itm_simple_sldtggl">Click here to toggle next DIV: 2</div>
    <div class="itm_simple_hddn">Here you may place any HTML text, Url , Video Iframe or images to hide.</div>
</div>
<div class="itm_simple_container">
    <div class="itm_simple_sldtggl">Click here to toggle next DIV: 3</div>
    <div class="itm_simple_hddn">Here you may place any HTML text, Url , Video Iframe or images to hide.</div>
</div>