<?php

$connector = new DbConnector(); // Change to YOUR db connection class.
$query = "SET NAMES 'utf8'"; // Put MySQL connection into UTF8 mode.
$connector->query($query); // Change to YOUR db query execution method.
		
$tables = array('table1','table2'); // Change to YOUR table names.
foreach($tables as $table) 
    {
    	   
        $sql = "SELECT * FROM {$table}";
        $rows = $connector->query($sql); // Change to YOUR db query execution method.
        while($row = mysql_fetch_assoc($rows))
            {
                $new = array();
                foreach($row as $key => $data)
                    {
                        $new[$key] = $connector->escapeString(html_entity_decode($data, ENT_QUOTES, 'UTF-8')); // Change to YOUR db escape execution method.
                    }
                array_shift($new);
                $new_string = "";
                $i = 0;
                foreach($new as $new_key => $new_data)
                    {
                        if($i > 0) { $new_string.= ", "; }
                        $new_string.= $new_key . "='" . $new_data . "'";
                        $i++;
                    }
                $sql = "UPDATE {$table} SET " . $new_string . " WHERE id='" . $row['id'] . "'";
                $connector->query($sql); // Change to YOUR db query execution method.
            }
    }

?>

<?php

$connector = new DbConnector(); // Change to YOUR db connection class.
$query = "SET NAMES 'utf8'"; // Put MySQL connection into UTF8 mode.
$connector->query($query); // Change to YOUR db query execution method.
		
$tables = array('table1','table2'); // Change to YOUR table names.
foreach($tables as $table) 
    {
    	   
        $sql = "SELECT * FROM {$table}";
        $rows = $connector->query($sql); // Change to YOUR db query execution method.
        while($row = mysql_fetch_assoc($rows))
            {
                $new = array();
                foreach($row as $key => $data)
                    {
                        $new[$key] = $connector->escapeString(html_entity_decode($data, ENT_QUOTES, 'UTF-8')); // Change to YOUR db escape execution method.
                    }
                array_shift($new);
                $new_string = "";
                $i = 0;
                foreach($new as $new_key => $new_data)
                    {
                        if($i > 0) { $new_string.= ", "; }
                        $new_string.= $new_key . "='" . $new_data . "'";
                        $i++;
                    }
                $sql = "UPDATE {$table} SET " . $new_string . " WHERE id='" . $row['id'] . "'";
                $connector->query($sql); // Change to YOUR db query execution method.
            }
    }
?>

http://stackoverflow.com/questions/2838245/how-to-remove-htmlentities-values-from-the-database

Sometimes a legacy database will have HTML entities stored in it.

This function converts them. Note that this function assumes you have a database abstraction layer, and may need to be modified to connect to YOUR database.

Convert all HTML entities in database to actual characters

mysql, database, html, convert

PHP