Google flagged– Malware found- Please help

I’m dealing w/a nasty piece of script that’s showing in the Page Source files. I can’t seem to find the script w/in the php files. Google’s flagged the site. I can’t seem to find the source of the script. My hosting provider has stated that they’ve removed the malware, but it keeps returning. Any ideas?

Here’s the script:
[Code moderated as per the Forum Rules. Please use the pastebin]

It keeps showing up on the following pages/tags:
/tag/web-traffic/ – Details
/tag/web-traffic/ – Details
/tag/social-media-2/ – Details
/tag/qr-codes/ – Details
/tag/productivity-tools-2/ – Details
/tag/mobile_marketing/ – Details
/tag/fan-pages/ – Details
/tag/facebook/ – Details
/video-resume/ – Details
/resources/ – Details
/internet-business-creation/ – Details
/contact-us/ – Details