Sublime text xml replace regex result -

i have problem replacing regex result in multiple xml tags in sumbilme text.

i have xml code multiple tags <startdate> in different groups this:

<group1>   <id>123</id>   <startdate>2011-11-11</startdate>   <city>new york</city>   .   . </group1> <group2>   <id>456</id>   <startdate>2013-10-01</startdate>   <classcode>123</classcode>   .   . </group2> <group1>   <id>789</id>   <startdate>2016-01-17</startdate>   <city>washington</city>   .   . </group1> <group2>   <id>135</id>   <startdate>2013-12-22</startdate>   <classcode>234</classcode>   .   . </group2> 

i replace every tag <startdate>(...some date...)</startdate> in <group2> <startdate1>(...some date...)</startdate1>

text in brackets (...some date...) different.

i started find tags , used code:

(?=.*<startdate>)(?=.*</startdate>                     <classcode>) 

and works. sublime found every tag <startdate>(...some date...)</startdate> in <group2>. have problem replace text in founded tags.

i tried put code 'replace' line:

(?=.*<startdate1>)(?=.*</startdate1>                     <classcode>) 

it didn't work.

so found option.

in 'find' line put:

(?=.*(<startdate)(>))(?=.*(</startdate)(>                     <classcode>)) 

and in 'replace' line:

$1 1 $2 $3 1 $4 

but result was:

. . </group1> <group2>   <id>456</id>   <startdate 1 > </startdate 1 >                     <classcode><startdate 1 > </startdate 1 >                     <classcode><startdate 1 > </startdate 1 >                     <classcode><startdate 1 > </startdate 1 >                     <classcode><startdate 1 > </startdate 1 >                     <classcode><startdate 1 > </startdate 1 >                     <classcode><startdate 1 > </startdate 1 >                     <classcode><startdate 1 > </startdate 1 >                     <classcode><startdate 1 > </startdate 1 >                     <classcode><startdate 1 > </startdate 1 >                     <classcode><startdate 1 > </startdate 1 >                     <classcode><startdate>2015-11-02</startdate>                     <classcode>123</classcode> 

so target tags didn't change new added...

and have result:

<group1>   <id>123</id>   <startdate>2011-11-11</startdate>   <city>new york</city>   .   . </group1> <group2>   <id>456</id>   <startdate1>2013-10-01</startdate1>   <classcode>123</classcode>   .   . </group2> 

is there way not replace tags names manualy?

something this?

<startdate>([\d-]+)<\/startdate>(?=\s*<classcode>) 

replace with:

<startdate1>$1</startdate1> 

test here