reversing strings of entities

[Pedro fp]

G'day Folks

I have a handful of HTML files containing lists of day & months names
for various calendars. Unfortunately those for right to left writing
systems such as Arabic & Hebrew are encoded as left to right. That's
fine in my web browser but when I copy the text to another application
the characters are reversed.

Can anyone suggest a fairly automated way of reversing the order of
the strings of entities so that (for example) this...
<bdo dir="ltr" lang="ar">&#1583;&#1581;&#1571;&#1604;&#1575;
&#1605;&#1608;&#1610;</bdo>
becomes...
<bdo dir="rtl" lang="ar">&#1610;&#1608;&#1605;
&#1575;&#1604;&#1571;&#1581;&#1583;</bdo>
(that string is the Arabic name for Sunday BTW)

I have a couple of hundred strings to switch around.

TIA & cheers, Pedro :-)

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