Tell us how we are to implement it and somebody will do it. 
$posted_text =~
s{<obscure>(.*?)</obscure>}
 {table><tr><td bgcolor='#000000'><font color='#000000'>$1</font></tab
+le>}g;

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In reply to Re^2: black tags by Anonymous Monk
in thread black tags by cog

Title:
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and:  <code> code here </code>
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