<style type="text/css">
.mobileShow {display: none;}

/* Smartphone Portrait and Landscape */
@media only screen
and (min-device-width : 320px)
and (max-device-width : 480px){ 
.mobileShow {display: inline;}
}
.mobileHide { display: inline; }

/* Smartphone Portrait and Landscape */
@media only screen
and (min-device-width : 320px)
and (max-device-width : 480px){
.mobileHide { display: none;}
}
</style>

<div class="mobileShow"> Your code snippet for mobile </div>

<div class="mobileHide"> Code snippet for desktop only </div>