<?php

function wr_replace_text($text){
    $replace = array(
            '„' => '&raquo;',
            '“' => '&raquo;',
            '›' => '&raquo;',
            '“' => '&laquo;',
            '”' => '&laquo;',
            '‹' => '&laquo;',
            ' - ' => ' &mdash; ',
            ' – ' => ' &mdash; ',
            ' –,' => ' &mdash;, ',
            '...' => '&hellip;',
            '(c)' => '&copy;'
    );
    $text = str_replace(array_keys($replace), $replace, $text);
    return $text;
}

echo wr_replace_text('iam voluptua. “At vero” eos et a');

iam voluptua. «At vero« eos et a