Что то с кодировкой.

<?php

                                /**
                                 * Find links and create the hyperlinks
                                 */
                                function hyperlinks($text) {
                                    $text = preg_replace('/\b([a-zA-Z]+:\/\/[\w_.\-]+\.[a-zA-Z]{2,6}[\/\w\-~.?=&%#+$*!]*)\b/i',"<a href="$1">$1</a>", $text);
                                    $text = preg_replace('/\b(?<!:\/\/)(www\.[\w_.\-]+\.[a-zA-Z]{2,6}[\/\w\-~.?=&%#+$*!]*)\b/i',"<a href="http://$1">$1</a>", $text);
                                    // match name@address
                                    $text = preg_replace("/\b([a-zA-Z][a-zA-Z0-9\_\.\-]*[a-zA-Z]*\@[a-zA-Z][a-zA-Z0-9\_\.\-]*[a-zA-Z]{2,6})\b/i","<a href="mailto://$1">$1</a>", $text);
                                    //mach #trendingtopics. Props to Michael Voigt
                                    $text = preg_replace('/([\.|\,|\:|\¡|\¿|\>|\{|\(]?)#{1}(\w*)([\.|\,|\:|\!|\?|\>|\}|\)]?)\s/i', "$1<a href="http://twitter.com/#search?q=$2">#$2</a>$3 ", $text);
                                    return $text;
                                }

                                /**
                                 * Find twitter usernames and link to them
                                 */
                                function twitter_users($text) {
                                    $text = preg_replace('/([\.|\,|\:|\¡|\¿|\>|\{|\(]?)@{1}(\w*)([\.|\,|\:|\!|\?|\>|\}|\)]?)\s/i', "$1<a href="http://twitter.com/$2">@$2</a>$3 ", $text);
                                    return $text;
                                }

                                /**
                                 * Encode single quotes in your tweets
                                 */
                                function encode_tweet($text) {
                                    $text = mb_convert_encoding( $text, "HTML-ENTITIES", "UTF-8");
                                    return $text;
                                }

                                $show_twitter = get_option('theme_show_twitter');

                                $consumer_key           = get_option('theme_twitter_consumer_key');
                                $consumer_secret        = get_option('theme_twitter_consumer_secret');
                                $access_token           = get_option('theme_twitter_access_token');
                                $access_token_secret    = get_option('theme_twitter_access_token_secret');

                                if( $show_twitter == 'true' && !empty($consumer_key) && !empty($consumer_secret) && !empty($access_token) && !empty($access_token_secret) )
								{

                                    /* Twitter API Version 1.1 Based Code */
                                    $twitter_user = get_option('theme_twitter_username');
                                    $tweets_count = 1;
                                    $transName = 'theme_tweets';
                                    $cacheTime = 10;

                                    if(false === ($twitterData = get_transient($transName) ) ){
                                        require_once get_template_directory().'/sections/twitteroauth/twitteroauth.php';

                                        $twitterConnection = new TwitterOAuth(
                                            $consumer_key,                  /* Consumer Key */
                                            $consumer_secret,   	        /* Consumer secret */
                                            $access_token,                  /* Access token */
                                            $access_token_secret            /* Access token secret */
                                        );

                                        $twitterData = $twitterConnection->get(
                                            'statuses/user_timeline',
                                            array(
                                                'screen_name'     => $twitter_user,
                                                'count'           => $tweets_count,
                                                'exclude_replies' => true
                                            )
                                        );

                                        if($twitterConnection->http_code != 200)
                                        {
                                            $twitterData = get_transient($transName);
                                        }
                                        // Save our new transient.
                                        set_transient($transName, $twitterData, 60 * $cacheTime);
                                    }

                                    if(!empty($twitterData) || !isset($twitterData['error'])){

                                        $i=0;
                                        $hyperlinks = true;
                                        $encode_utf8 = true;
                                        $twitter_users = true;
                                        $update = true;

                                        echo '<ul id="twitter_update_list">';
                                        foreach($twitterData as $item){
                                            $msg = $item->text;

                                            if($encode_utf8) $msg = utf8_encode($msg);

                                            $msg = encode_tweet($msg);

                                            echo '<li class="twitter-item">';
                                            if ($hyperlinks) {    $msg = hyperlinks($msg); }
                                            if ($twitter_users)  { $msg = twitter_users($msg); }
                                            echo $msg;
                                            if($update) {
                                                $time = strtotime($item->created_at);

                                                if ( ( abs( time() - $time) ) < 86400 )
                                                    $h_time = sprintf( __('%s ago','framework'), human_time_diff( $time ) );
                                                else
                                                    $h_time = date(__('jS M Y','framework'), $time);

                                                echo sprintf( __('%s', 'framework'),' - <span class="twitter-timestamp">' . $h_time . '</span>' );
                                            }
                                            echo '';
                                            $i++;
                                            if ( $i >= $tweets_count ) break;
                                        }
                                        echo '';
                                    }
								}

							    ?>

Юрий , вы как всегда на высоте . Спасибо!