Noviomagic and techblerf for the masses

class Edit_Email {
    function start() {
        ob_start();
    }
 
    function footer() {
        $content = ob_get_contents();
 
        ob_end_clean();
 
        $this->replace( $content );
 
        echo $content;
    }
 
    function replace( &$content ) {
 
    	// E-mail:
        $pattern = array(
            '/E-mail <span.+?<\/span>/',
            '/<input type="text"(.*?)value="(\\S+@\\S+\\.\\w+)[^>]*\/>/'
        );
        $replacement = array(
            'E-mail',
            '<input type="hidden"\1value="\2" /> \2 '
        );/* Please Contact Tech support to change your email. */
        $content = preg_replace( $pattern, $replacement, $content );
 
 
        // first_name
        $pattern = array(
			'/<input type="text" name="first_name" (.*?)value="(.*?)" class="regular-text" \/>/'            
        );
        $replacement = array(
            '<input type="hidden" name="first_name" \1 value="\2" /> \2 '
        );
        $content = preg_replace( $pattern, $replacement, $content );
 
        // last_name
        $pattern = array(
			'/<input type="text" name="last_name" (.*?)value="(.*?)" class="regular-text" \/>/'            
        );
        $replacement = array(
            '<input type="hidden" name="last_name" \1 value="\2" /> \2 '
        );
        $content = preg_replace( $pattern, $replacement, $content );
 
        // site (url)
        $pattern = array(
			'/<input type="text" name="url" (.*?)value="(.*?)" class="regular-text code" \/>/'            
        );
        $replacement = array(
            '<input type="hidden" name="url" \1 value="\2" /> \2 '
        );
        $content = preg_replace( $pattern, $replacement, $content );
 
    }
}
 
if ( ! current_user_can( 'edit_users' ) && ( $pagenow == 'profile.php' ) ) :
    $edit_email = new Edit_Email();
    $edit_email->start();
 
    add_action( 'admin_footer', array( &$edit_email, 'footer' ) );
endif;