<?php
 
// your code goes here
$text = 'mr[242] = {TId:19,Url:"1.swf"};
mr[243] = {TId:19,Url:"2.swf""};
mr[244] = {TId:19,Url:"3.swf"};
mr[245] = {TId:14,Url:"4.swf"};
mr[246] = {TId:14,Url:"5.swf"};
mr[247] = {TId:14,Url:"6.swf"};
mr[248] = {TId:14,Url:"7.swf"};';
 
$reg = '/mr\[(\d+)]\s=\s\{TId:(\d+),Url:"([^"]+)"+};/';
 
echo preg_replace_callback(
        $reg,
        function ($matches) {
            return "<i Id=\"{$matches[1]}\" TId=\"{$matches[2]}\" Url=\"{$matches[2]}\" />";
        },
        $text
    );

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