Description
string 
mb_eregi_replace ( string pattern, string replace, string string [, string option] )
     mb_ereg_replace() scans
     string for matches to
     pattern, then replaces the matched text
     with replacement and returns the result
     string or FALSE on error. Multibyte character can be used in
     pattern. The case will be ignored.
     option has the same meaning as in
     mb_ereg_replace().
    
     The internal encoding or the character encoding specified in
     mb_regex_encoding() will be used as character
     encoding.
    
     See also: mb_regex_encoding(),
     mb_ereg_replace().